[SANOG] Weekly Global IPv4 Routing Table Report

Routing Table Analysis Role Account cscora at apnic.net
Fri Nov 26 18:02:57 UTC 2021


This is an automated weekly mailing describing the state of the Gobal
IPv4 Routing Table  as seen from APNIC's router in Japan.

The posting is sent to APOPS, NANOG, AfNOG, SANOG, PacNOG, SAFNOG
TZNOG, MENOG, BJNOG, SDNOG, CMNOG, LACNOG and the RIPE Routing WG.

Daily listings are sent to bgp-stats at lists.apnic.net

For historical data, please see https://thyme.apnic.net.

If you have any comments please contact Philip Smith <pfsinoz at gmail.com>.

Global IPv4 Routing Table Report   04:00 +10GMT Sat 27 Nov, 2021

  BGP Table  as seen in Japan.

Report Website:     https://thyme.apnic.net
Detailed Analysis:  https://thyme.apnic.net/current/

Analysis Summary
----------------

BGP routing table entries examined:                              872472
    Prefixes after maximum aggregation (per Origin AS):          330087
    Deaggregation factor:                                          2.64
    Unique aggregates announced (without unneeded subnets):      421607
    Number of IPv4 prefixes with ROAs (including AS0):           247772
Total ASes present in the Internet Routing Table:                 72382
    Prefixes per ASN:                                             12.05
Origin-only ASes present in the Internet Routing Table:           62143
Origin ASes announcing only one prefix:                           25685
Transit ASes present in the Internet Routing Table:               10239
Transit-only ASes present in the Internet Routing Table:            357
Average AS path length visible in the Internet Routing Table:       4.3
    Max AS path length visible:                                      53
    Max AS path prepend of ASN (265020)                              50
Prefixes from unregistered ASNs in the Routing Table:               893
    Number of instances of unregistered ASNs:                       897
Number of 32-bit ASNs allocated by the RIRs:                      37925
Number of 32-bit ASNs visible in the Routing Table:               31495
Prefixes from 32-bit ASNs in the Routing Table:                  145183
Number of bogon 32-bit ASNs visible in the Routing Table:            24
Special use prefixes present in the Routing Table:                    1
Prefixes being announced from unallocated address space:            862
Number of addresses announced to Internet:                   3071623936
    Equivalent to 183 /8s, 21 /16s and 67 /24s
    Percentage of available address space announced:               83.0
    Percentage of allocated address space announced:               83.0
    Percentage of available address space allocated:              100.0
    Percentage of address space in use by end-sites:               99.5
Total number of prefixes smaller than registry allocations:      290843

APNIC Region Analysis Summary
-----------------------------

Prefixes being announced by APNIC Region ASes:                   231533
    Total APNIC prefixes after maximum aggregation:               64938
    APNIC Deaggregation factor:                                    3.57
Prefixes being announced from the APNIC address blocks:          226709
    Unique aggregates announced from the APNIC address blocks:    93050
APNIC Region origin ASes present in the Internet Routing Table:   12153
    APNIC Prefixes per ASN:                                       18.65
APNIC Region origin ASes announcing only one prefix:               3493
APNIC Region transit ASes present in the Internet Routing Table:   1710
Average APNIC Region AS path length visible:                        4.5
    Max APNIC Region AS path length visible:                         37
Number of APNIC region 32-bit ASNs visible in the Routing Table:   7333
Number of APNIC addresses announced to Internet:              773087360
    Equivalent to 46 /8s, 20 /16s and 96 /24s
APNIC AS Blocks        4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations)  23552-24575, 37888-38911, 45056-46079, 55296-56319,
                       58368-59391, 63488-64098, 64297-64395, 131072-151865
APNIC Address Blocks     1/8,  14/8,  27/8,  36/8,  39/8,  42/8,  43/8,
                        49/8,  58/8,  59/8,  60/8,  61/8, 101/8, 103/8,
                       106/8, 110/8, 111/8, 112/8, 113/8, 114/8, 115/8,
                       116/8, 117/8, 118/8, 119/8, 120/8, 121/8, 122/8,
                       123/8, 124/8, 125/8, 126/8, 133/8, 150/8, 153/8,
                       163/8, 171/8, 175/8, 180/8, 182/8, 183/8, 202/8,
                       203/8, 210/8, 211/8, 218/8, 219/8, 220/8, 221/8,
                       222/8, 223/8,

ARIN Region Analysis Summary
----------------------------

Prefixes being announced by ARIN Region ASes:                    256209
    Total ARIN prefixes after maximum aggregation:               118264
    ARIN Deaggregation factor:                                     2.17
Prefixes being announced from the ARIN address blocks:           255844
    Unique aggregates announced from the ARIN address blocks:    122186
ARIN Region origin ASes present in the Internet Routing Table:    18952
    ARIN Prefixes per ASN:                                        13.50
ARIN Region origin ASes announcing only one prefix:                6862
ARIN Region transit ASes present in the Internet Routing Table:    1967
Average ARIN Region AS path length visible:                         3.8
    Max ARIN Region AS path length visible:                          35
Number of ARIN region 32-bit ASNs visible in the Routing Table:    4229
Number of ARIN addresses announced to Internet:              1301302016
    Equivalent to 77 /8s, 144 /16s and 75 /24s
ARIN AS Blocks         1-1876, 1902-2042, 2044-2046, 2048-2106
(pre-ERX allocations)  2138-2584, 2615-2772, 2823-2829, 2880-3153
                       3354-4607, 4865-5119, 5632-6655, 6912-7466
                       7723-8191, 10240-12287, 13312-15359, 16384-17407
                       18432-20479, 21504-23551, 25600-26591,
                       26624-27647, 29696-30719, 31744-33791
                       35840-36863, 39936-40959, 46080-47103
                       53248-55295, 62464-63487, 64198-64296, 393216-401308
ARIN Address Blocks      3/8,   4/8,   6/8,   7/8,   8/8,   9/8,  11/8,
                        12/8,  13/8,  15/8,  16/8,  17/8,  18/8,  19/8,
                        20/8,  21/8,  22/8,  23/8,  24/8,  26/8,  28/8,
                        29/8,  30/8,  32/8,  33/8,  34/8,  35/8,  38/8,
                        40/8,  44/8,  47/8,  48/8,  50/8,  52/8,  53/8,
                        54/8,  55/8,  56/8,  57/8,  63/8,  64/8,  65/8,
                        66/8,  67/8,  68/8,  69/8,  70/8,  71/8,  72/8,
                        73/8,  74/8,  75/8,  76/8,  96/8,  97/8,  98/8,
                        99/8, 100/8, 104/8, 107/8, 108/8, 128/8, 129/8,
                       130/8, 131/8, 132/8, 134/8, 135/8, 136/8, 137/8,
                       138/8, 139/8, 140/8, 142/8, 143/8, 144/8, 146/8,
                       147/8, 148/8, 149/8, 152/8, 155/8, 156/8, 157/8,
                       158/8, 159/8, 160/8, 161/8, 162/8, 164/8, 165/8,
                       166/8, 167/8, 168/8, 169/8, 170/8, 172/8, 173/8,
                       174/8, 184/8, 192/8, 198/8, 199/8, 204/8, 205/8,
                       206/8, 207/8, 208/8, 209/8, 214/8, 215/8, 216/8,
                      

RIPE Region Analysis Summary
----------------------------

Prefixes being announced by RIPE Region ASes:                    243696
    Total RIPE prefixes after maximum aggregation:               113966
    RIPE Deaggregation factor:                                     2.14
Prefixes being announced from the RIPE address blocks:           239822
    Unique aggregates announced from the RIPE address blocks:    146828
RIPE Region origin ASes present in the Internet Routing Table:    28162
    RIPE Prefixes per ASN:                                         8.52
RIPE Region origin ASes announcing only one prefix:               12153
RIPE Region transit ASes present in the Internet Routing Table:    3938
Average RIPE Region AS path length visible:                         4.3
    Max RIPE Region AS path length visible:                          31
Number of RIPE region 32-bit ASNs visible in the Routing Table:   10550
Number of RIPE addresses announced to Internet:               712438400
    Equivalent to 42 /8s, 118 /16s and 242 /24s
RIPE AS Blocks         1877-1901, 2043, 2047, 2107-2136, 2585-2614
(pre-ERX allocations)  2773-2822, 2830-2879, 3154-3353, 5377-5631
                       6656-6911, 8192-9215, 12288-13311, 15360-16383
                       20480-21503, 24576-25599, 28672-29695
                       30720-31743, 33792-35839, 38912-39935
                       40960-45055, 47104-52223, 56320-58367
                       59392-61439, 61952-62463, 64396-64495
                       196608-213403
RIPE Address Blocks      2/8,   5/8,  25/8,  31/8,  37/8,  46/8,  51/8,
                        62/8,  77/8,  78/8,  79/8,  80/8,  81/8,  82/8,
                        83/8,  84/8,  85/8,  86/8,  87/8,  88/8,  89/8,
                        90/8,  91/8,  92/8,  93/8,  94/8,  95/8, 109/8,
                       141/8, 145/8, 151/8, 176/8, 178/8, 185/8, 188/8,
                       193/8, 194/8, 195/8, 212/8, 213/8, 217/8,

LACNIC Region Analysis Summary
------------------------------

Prefixes being announced by LACNIC Region ASes:                  113030
    Total LACNIC prefixes after maximum aggregation:              27001
    LACNIC Deaggregation factor:                                   4.19
Prefixes being announced from the LACNIC address blocks:         113942
    Unique aggregates announced from the LACNIC address blocks:   47540
LACNIC Region origin ASes present in the Internet Routing Table:  10805
    LACNIC Prefixes per ASN:                                      10.55
LACNIC Region origin ASes announcing only one prefix:              2627
LACNIC Region transit ASes present in the Internet Routing Table:  2145
Average LACNIC Region AS path length visible:                       5.0
    Max LACNIC Region AS path length visible:                        53
Number of LACNIC region 32-bit ASNs visible in the Routing Table:  8482
Number of LACNIC addresses announced to Internet:             176399872
    Equivalent to 10 /8s, 131 /16s and 166 /24s
LACNIC AS Blocks       26592-26623, 27648-28671, 52224-53247,
                       61440-61951, 64099-64197, 262144-272796 + ERX transfers
LACNIC Address Blocks  177/8, 179/8, 181/8, 186/8, 187/8, 189/8, 190/8,
                       191/8, 200/8, 201/8,

AfriNIC Region Analysis Summary
-------------------------------

Prefixes being announced by AfriNIC Region ASes:                  27111
    Total AfriNIC prefixes after maximum aggregation:              5239
    AfriNIC Deaggregation factor:                                  5.17
Prefixes being announced from the AfriNIC address blocks:         35293
    Unique aggregates announced from the AfriNIC address blocks:  11220
AfriNIC Region origin ASes present in the Internet Routing Table:  1571
    AfriNIC Prefixes per ASN:                                     22.47
AfriNIC Region origin ASes announcing only one prefix:              550
AfriNIC Region transit ASes present in the Internet Routing Table:  304
Average AfriNIC Region AS path length visible:                      5.1
    Max AfriNIC Region AS path length visible:                       42
Number of AfriNIC region 32-bit ASNs visible in the Routing Table:  901
Number of AfriNIC addresses announced to Internet:            107848192
    Equivalent to 6 /8s, 109 /16s and 162 /24s
AfriNIC AS Blocks      36864-37887, 327680-329727 & ERX transfers
AfriNIC Address Blocks  41/8,  45/8, 102/8, 105/8, 154/8, 196/8, 197/8,
                      


APNIC Region per AS prefix count summary
----------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
  9808        8744       9000      57  CHINAMOBILE-CN China Mobile Communicati
  7545        5861        787     684  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4665       4192      74  ERX-CERNET-BKB China Education and Rese
  7552        3593       1330      20  VIETEL-AS-AP Viettel Group, VN
  7713        3495       1023      57  TELKOMNET-AS-AP PT Telekomunikasi Indon
 45899        3233       1896      54  VNPT-AS-VN VNPT Corp, VN
  4766        2503      11119     579  KIXS-AS-KR Korea Telecom, KR
  9498        2182        475     237  BBIL-AP BHARTI Airtel Ltd., IN
 45090        2135       1198      75  TENCENT-NET-AP Shenzhen Tencent Compute
  4755        2121        429     202  TATACOMM-AS TATA Communications formerl

Complete listing at https://thyme.apnic.net/current/data-ASnet-APNIC

ARIN Region per AS prefix count summary
---------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
 16509        6016      10015    2587  AMAZON-02, US
 11492        4593        304     821  CABLEONE, US
 22773        4017       3047     372  ASN-CXA-ALL-CCI-22773-RDC, US
  7155        3950        264      30  VIASAT-SP-BACKBONE, US
 16625        3679       1896    2559  AKAMAI-AS, US
  6327        3389       1318      65  SHAW, CA
   749        2890      50784    2146  DNIC-AS-00749, US
 30036        2599        373     153  MEDIACOM-ENTERPRISE-BUSINESS, US
   209        2522       5043     434  CENTURYLINK-US-LEGACY-QWEST, US
 20115        2243       3033     502  CHARTER-20115, US

Complete listing at https://thyme.apnic.net/current/data-ASnet-ARIN

RIPE Region per AS prefix count summary
---------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
 12479        6863       1731     149  UNI2-AS, ES
 20940        3922       3348     218  AKAMAI-ASN1, NL
  8551        3448        378      39  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
 39891        3271        187      23  ALJAWWALSTC-AS, SA
 12389        2932       2279     898  ROSTELECOM-AS, RU
  9009        2559        263    1348  M247, GB
 34984        2204        355     601  TELLCOM-AS, TR
 58224        1759        918     579  TCI, IR
 61317        1653        214     927  ASDETUK www.heficed.com, GB
 13188        1610        100      27  TRIOLAN, UA

Complete listing at https://thyme.apnic.net/current/data-ASnet-RIPE

LACNIC Region per AS prefix count summary
-----------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
  8151       10647       3450     577  Uninet S.A. de C.V., MX
 10620        3251        491     826  Telmex Colombia S.A., CO
 11830        2467        369      62  Instituto Costarricense de Electricidad
 13999        1612        285     457  Mega Cable, S.A. de C.V., MX
  6503        1488        357     499  Axtel, S.A.B. de C.V., MX
 28573        1395       2317     257  CLARO S.A., BR
  3816        1240        651     153  COLOMBIA TELECOMUNICACIONES S.A. ESP, C
 26615        1139       2351     139  TIM SA, BR
  6147        1087        369      21  Telefonica del Peru S.A.A., PE
 11664         980        189     441  Techtel LMDS Comunicaciones Interactiva

Complete listing at https://thyme.apnic.net/current/data-ASnet-LACNIC

AfriNIC Region per AS prefix count summary
------------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
 24863        1632        393      21  LINKdotNET-AS, EG
 24835        1553        507      33  RAYA-AS, EG
 36992        1286       1430     268  ETISALAT-MISR, EG
 36903        1183        537     110  MT-MPLS, MA
 29571         825         68      11  ORANGE-COTE-IVOIRE, CI
 36935         703        523      44  Vodafone-, EG
  6713         612       1863      34  IAM-AS, MA
 15399         516         50      31  WANANCHI-, KE
 37342         470         32       1  MOVITEL, MZ
 23889         428        232      16  MauritiusTelecom, MU

Complete listing at https://thyme.apnic.net/current/data-ASnet-AFRINIC

Global Per AS prefix count summary
----------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
  8151       10647       3450     577  Uninet S.A. de C.V., MX
  9808        8744       9000      57  CHINAMOBILE-CN China Mobile Communicati
 12479        6863       1731     149  UNI2-AS, ES
 16509        6016      10015    2587  AMAZON-02, US
  7545        5861        787     684  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4665       4192      74  ERX-CERNET-BKB China Education and Rese
 11492        4593        304     821  CABLEONE, US
 22773        4017       3047     372  ASN-CXA-ALL-CCI-22773-RDC, US
  7155        3950        264      30  VIASAT-SP-BACKBONE, US
 20940        3922       3348     218  AKAMAI-ASN1, NL

Complete listing at https://thyme.apnic.net/current/data-ASnet

Global Per AS Maximum Aggregation summary
-----------------------------------------

   ASN  No of nets  Net Savings  Description
  9808        8744         8687  CHINAMOBILE-CN China Mobile Communications Grou
 12479        6863         6714  UNI2-AS, ES
  7545        5861         5177  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4665         4591  ERX-CERNET-BKB China Education and Research Net
  7155        3950         3920  VIASAT-SP-BACKBONE, US
 11492        4593         3772  CABLEONE, US
 20940        3922         3704  AKAMAI-ASN1, NL
 22773        4017         3645  ASN-CXA-ALL-CCI-22773-RDC, US
  7552        3593         3573  VIETEL-AS-AP Viettel Group, VN
  7713        3495         3438  TELKOMNET-AS-AP PT Telekomunikasi Indonesia, ID

Complete listing at https://thyme.apnic.net/current/data-CIDRnet

List of Unregistered Origin ASNs (Global)
-----------------------------------------

    Bad AS  Designation  Net Originated      Transit AS  Transit AS Name
     46990  UNALLOCATED  8.5.242.0/23              3356  LEVEL3, US
     62828  UNALLOCATED  8.21.130.0/24             3356  LEVEL3, US
    393266  UNALLOCATED  8.23.52.0/24             46887  LIGHTOWER, US
     18604  UNALLOCATED  8.25.204.0/24             3356  LEVEL3, US
    394936  UNALLOCATED  8.33.224.0/24              174  COGENT-174, US
     54338  UNALLOCATED  8.33.241.0/24             6461  ZAYO-6461, US
      1782  UNALLOCATED  8.42.19.0/24             46887  LIGHTOWER, US
    395438  UNALLOCATED  8.42.206.0/24             3356  LEVEL3, US
    395056  UNALLOCATED  8.45.133.0/24             3356  LEVEL3, US
     32306  UNALLOCATED  8.46.80.0/24             33652  CMCS, US

Complete listing at https://thyme.apnic.net/current/data-badAS

Prefixes from private and non-routed address space (Global)
-----------------------------------------------------------

Prefix                Origin AS  Description
192.88.99.0/24             6939  HURRICANE, US

Complete listing at https://thyme.apnic.net/current/data-dsua

Advertised Unallocated Addresses
--------------------------------

Unassigned Network     ASN Information  AS Name
23.141.0.0/24        Origin:    395350  UNASSIGNED
23.141.0.0/24       Transit:     11426  TWC-11426-CAROLINAS, US
23.252.160.0/24      Origin:    398968  GROUP-IID-01, US
23.252.160.0/24     Transit:      1299  TWELVE99 Twelve99, Telia Carrier, SE
23.252.161.0/24      Origin:    398968  GROUP-IID-01, US
23.252.161.0/24     Transit:      1299  TWELVE99 Twelve99, Telia Carrier, SE
23.252.162.0/24      Origin:    398968  GROUP-IID-01, US
23.252.162.0/24     Transit:      1299  TWELVE99 Twelve99, Telia Carrier, SE
23.252.163.0/24      Origin:    398968  GROUP-IID-01, US
23.252.163.0/24     Transit:      1299  TWELVE99 Twelve99, Telia Carrier, SE

Complete listing at https://thyme.apnic.net/current/data-add-IANA

Number of prefixes announced per prefix length (Global)
-------------------------------------------------------

 /1:0        /2:0        /3:0        /4:0        /5:0        /6:0       
 /7:0        /8:16       /9:13      /10:41      /11:101     /12:304     
/13:597     /14:1216    /15:2046    /16:13550   /17:8270    /18:13913   
/19:25222   /20:43098   /21:50983   /22:107611  /23:93957   /24:510735  
/25:799     /26:0       /27:0       /28:0       /29:0       /30:0       
/31:0       /32:0       

Advertised prefixes smaller than registry allocations
-----------------------------------------------------

   ASN  No of nets  Total ann.  Description
 12479        5810        6863  UNI2-AS, ES
  8151        4446       10647  Uninet S.A. de C.V., MX
 11492        3546        4593  CABLEONE, US
  6327        3197        3389  SHAW, CA
  7155        3040        3950  VIASAT-SP-BACKBONE, US
 22773        2994        4017  ASN-CXA-ALL-CCI-22773-RDC, US
  8551        2913        3448  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
 39891        2807        3271  ALJAWWALSTC-AS, SA
 30036        2254        2599  MEDIACOM-ENTERPRISE-BUSINESS, US
 11830        1921        2467  Instituto Costarricense de Electricidad y Telec

Complete listing at https://thyme.apnic.net/current/data-sXXas-nos

Number of /24s announced per /8 block (Global)
----------------------------------------------

   1:1912      2:1036      3:146       4:18        5:3721      6:100    
   7:5         8:1556      9:1        11:172      12:1707     13:411    
  14:2281     15:132      16:32       17:374      18:130      20:142    
  21:4        22:188      23:5325     24:2371     25:4        27:2565   
  29:19       31:2372     32:106      34:1        35:48       36:1736   
  37:3911     38:2372     39:651      40:149      41:3903     42:1023   
  43:2095     44:294      45:15638    46:3795     47:322      49:1688   
  50:1881     51:104      52:1345     54:288      55:647      56:4      
  57:55       58:1745     59:1128     60:940      61:2246     62:2408   
  63:1951     64:5410     65:2350     66:4944     67:2899     68:1174   
  69:4148     70:1344     71:678      72:3093     74:2615     75:1502   
  76:710      77:2133     78:1748     79:2702     80:1875     81:1497   
  82:1415     83:1174     84:1300     85:2827     86:700      87:1884   
  88:978      89:3144     90:488      91:7501     92:1891     93:2573   
  94:3227     95:3588     96:1299     97:347      98:983      99:911    
 100:76      101:1057    102:1792    103:27563   104:4103    105:424    
 106:842     107:2391    108:753     109:3989    110:2066    111:3148   
 112:1960    113:1519    114:1541    115:1937    116:1892    117:2480   
 118:2306    119:1850    120:1619    121:1042    122:2547    123:2133   
 124:1598    125:2043    128:1408    129:1102    130:914     131:2068   
 132:748     133:366     134:1918    135:285     136:785     137:859    
 138:2432    139:1204    140:842     141:1313    142:1225    143:1351   
 144:1251    145:330     146:1685    147:1461    148:2229    149:1586   
 150:852     151:1088    152:1651    153:442     154:3310    155:1363   
 156:1832    157:1201    158:988     159:2017    160:2329    161:1272   
 162:3409    163:1174    164:1648    165:1502    166:603     167:1668   
 168:3633    169:682     170:4301    171:807     172:2849    173:3044   
 174:1005    175:1134    176:3419    177:4466    178:3004    179:1943   
 180:2266    181:2621    182:3168    183:1924    184:2410    185:19053  
 186:4237    187:3532    188:3632    189:3107    190:8747    191:1336   
 192:11008   193:8430    194:6892    195:4931    196:2901    197:2316   
 198:6016    199:6010    200:7432    201:5675    202:10519   203:10058  
 204:4501    205:3386    206:3848    207:3381    208:4010    209:4611   
 210:4232    211:2435    212:3835    213:3384    214:1162    215:64     
 216:6392    217:2609    218:1213    219:620     220:1965    221:989    
 222:852     223:2106   

End of report


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