[SANOG] Weekly Global IPv4 Routing Table Report

Routing Table Analysis Role Account cscora at apnic.net
Fri Dec 3 18:02:54 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 04 Dec, 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:                              872006
    Prefixes after maximum aggregation (per Origin AS):          330232
    Deaggregation factor:                                          2.64
    Unique aggregates announced (without unneeded subnets):      422156
    Number of IPv4 prefixes with ROAs (including AS0):           249668
Total ASes present in the Internet Routing Table:                 72344
    Prefixes per ASN:                                             12.05
Origin-only ASes present in the Internet Routing Table:           62105
Origin ASes announcing only one prefix:                           25642
Transit ASes present in the Internet Routing Table:               10239
Transit-only ASes present in the Internet Routing Table:            369
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:               887
    Number of instances of unregistered ASNs:                       889
Number of 32-bit ASNs allocated by the RIRs:                      37979
Number of 32-bit ASNs visible in the Routing Table:               31483
Prefixes from 32-bit ASNs in the Routing Table:                  145463
Number of bogon 32-bit ASNs visible in the Routing Table:            26
Special use prefixes present in the Routing Table:                    1
Prefixes being announced from unallocated address space:            846
Number of addresses announced to Internet:                   3072974336
    Equivalent to 183 /8s, 41 /16s and 222 /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:      290540

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

Prefixes being announced by APNIC Region ASes:                   231180
    Total APNIC prefixes after maximum aggregation:               64867
    APNIC Deaggregation factor:                                    3.56
Prefixes being announced from the APNIC address blocks:          226302
    Unique aggregates announced from the APNIC address blocks:    93047
APNIC Region origin ASes present in the Internet Routing Table:   12095
    APNIC Prefixes per ASN:                                       18.71
APNIC Region origin ASes announcing only one prefix:               3445
APNIC Region transit ASes present in the Internet Routing Table:   1696
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:   7281
Number of APNIC addresses announced to Internet:              772945024
    Equivalent to 46 /8s, 18 /16s and 52 /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:                    256286
    Total ARIN prefixes after maximum aggregation:               118209
    ARIN Deaggregation factor:                                     2.17
Prefixes being announced from the ARIN address blocks:           255988
    Unique aggregates announced from the ARIN address blocks:    122305
ARIN Region origin ASes present in the Internet Routing Table:    18945
    ARIN Prefixes per ASN:                                        13.51
ARIN Region origin ASes announcing only one prefix:                6864
ARIN Region transit ASes present in the Internet Routing Table:    1961
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:    4238
Number of ARIN addresses announced to Internet:              1301094144
    Equivalent to 77 /8s, 141 /16s and 31 /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:                    243471
    Total RIPE prefixes after maximum aggregation:               114034
    RIPE Deaggregation factor:                                     2.14
Prefixes being announced from the RIPE address blocks:           239594
    Unique aggregates announced from the RIPE address blocks:    147010
RIPE Region origin ASes present in the Internet Routing Table:    28167
    RIPE Prefixes per ASN:                                         8.51
RIPE Region origin ASes announcing only one prefix:               12154
RIPE Region transit ASes present in the Internet Routing Table:    3936
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:   10564
Number of RIPE addresses announced to Internet:               713663360
    Equivalent to 42 /8s, 137 /16s and 163 /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:                  113023
    Total LACNIC prefixes after maximum aggregation:              27152
    LACNIC Deaggregation factor:                                   4.16
Prefixes being announced from the LACNIC address blocks:         113869
    Unique aggregates announced from the LACNIC address blocks:   47730
LACNIC Region origin ASes present in the Internet Routing Table:  10809
    LACNIC Prefixes per ASN:                                      10.53
LACNIC Region origin ASes announcing only one prefix:              2625
LACNIC Region transit ASes present in the Internet Routing Table:  2149
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:  8489
Number of LACNIC addresses announced to Internet:             176382720
    Equivalent to 10 /8s, 131 /16s and 99 /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:                  27159
    Total AfriNIC prefixes after maximum aggregation:              5293
    AfriNIC Deaggregation factor:                                  5.13
Prefixes being announced from the AfriNIC address blocks:         35407
    Unique aggregates announced from the AfriNIC address blocks:  11292
AfriNIC Region origin ASes present in the Internet Routing Table:  1581
    AfriNIC Prefixes per ASN:                                     22.40
AfriNIC Region origin ASes announcing only one prefix:              554
AfriNIC Region transit ASes present in the Internet Routing Table:  310
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:  911
Number of AfriNIC addresses announced to Internet:            108346624
    Equivalent to 6 /8s, 117 /16s and 61 /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        8752       9000      57  CHINAMOBILE-CN China Mobile Communicati
  7545        5859        787     681  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4670       4192      74  ERX-CERNET-BKB China Education and Rese
  7552        3575       1330      20  VIETEL-AS-AP Viettel Group, VN
  7713        3480       1022      56  TELKOMNET-AS-AP PT Telekomunikasi Indon
 45899        3251       1896      54  VNPT-AS-VN VNPT Corp, VN
  4766        2501      11119     579  KIXS-AS-KR Korea Telecom, KR
  9498        2187        476     238  BBIL-AP BHARTI Airtel Ltd., IN
 45090        2136       1198      75  TENCENT-NET-AP Shenzhen Tencent Compute
  4755        2121        429     203  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        6009      10029    2575  AMAZON-02, US
 11492        4593        304     819  CABLEONE, US
 22773        4016       3046     371  ASN-CXA-ALL-CCI-22773-RDC, US
  7155        3950        264      30  VIASAT-SP-BACKBONE, US
 16625        3677       1896    2557  AKAMAI-AS, US
  6327        3390       1318      64  SHAW, CA
   749        2890      50784    2146  DNIC-AS-00749, US
 30036        2604        374     129  MEDIACOM-ENTERPRISE-BUSINESS, US
   209        2525       5043     435  CENTURYLINK-US-LEGACY-QWEST, US
 20115        2236       3032     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        6855       1733     150  UNI2-AS, ES
 20940        3872       3348     209  AKAMAI-ASN1, NL
  8551        3453        378      39  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
 39891        3271        187      23  ALJAWWALSTC-AS, SA
 12389        2935       2279     899  ROSTELECOM-AS, RU
  9009        2568        264    1347  M247, GB
 34984        2204        355     598  TELLCOM-AS, TR
 58224        1753        917     576  TCI, IR
 61317        1654        215     932  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       10498       3450     583  Uninet S.A. de C.V., MX
 10620        3252        491     832  Telmex Colombia S.A., CO
 11830        2469        369      62  Instituto Costarricense de Electricidad
 13999        1617        284     456  Mega Cable, S.A. de C.V., MX
  6503        1434        354     521  Axtel, S.A.B. de C.V., MX
 28573        1396       2317     261  CLARO S.A., BR
  3816        1240        651     153  COLOMBIA TELECOMUNICACIONES S.A. ESP, C
 26615        1145       2351     141  TIM SA, BR
  6147        1089        370      21  Telefonica del Peru S.A.A., PE
 11664         981        189     442  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        1625        393      21  LINKdotNET-AS, EG
 24835        1549        499      32  RAYA-AS, EG
 36992        1287       1430     268  ETISALAT-MISR, EG
 36903        1195        543     114  MT-MPLS, MA
 29571         821         68      11  ORANGE-COTE-IVOIRE, CI
 36935         704        523      44  Vodafone-, EG
  6713         612       1863      34  IAM-AS, MA
 15399         517         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       10498       3450     583  Uninet S.A. de C.V., MX
  9808        8752       9000      57  CHINAMOBILE-CN China Mobile Communicati
 12479        6855       1733     150  UNI2-AS, ES
 16509        6009      10029    2575  AMAZON-02, US
  7545        5859        787     681  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4670       4192      74  ERX-CERNET-BKB China Education and Rese
 11492        4593        304     819  CABLEONE, US
 22773        4016       3046     371  ASN-CXA-ALL-CCI-22773-RDC, US
  7155        3950        264      30  VIASAT-SP-BACKBONE, US
 20940        3872       3348     209  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        8752         8695  CHINAMOBILE-CN China Mobile Communications Grou
 12479        6855         6705  UNI2-AS, ES
  7545        5859         5178  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4670         4596  ERX-CERNET-BKB China Education and Research Net
  7155        3950         3920  VIASAT-SP-BACKBONE, US
 11492        4593         3774  CABLEONE, US
 20940        3872         3663  AKAMAI-ASN1, NL
 22773        4016         3645  ASN-CXA-ALL-CCI-22773-RDC, US
  7552        3575         3555  VIETEL-AS-AP Viettel Group, VN
 16509        6009         3434  AMAZON-02, US

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     /12:305     
/13:596     /14:1213    /15:2044    /16:13546   /17:8288    /18:13917   
/19:25220   /20:43065   /21:50996   /22:107561  /23:93845   /24:510449  
/25:790     /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        5786        6855  UNI2-AS, ES
  8151        4324       10498  Uninet S.A. de C.V., MX
 11492        3546        4593  CABLEONE, US
  6327        3199        3390  SHAW, CA
  7155        3040        3950  VIASAT-SP-BACKBONE, US
 22773        2994        4016  ASN-CXA-ALL-CCI-22773-RDC, US
  8551        2918        3453  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
 39891        2807        3271  ALJAWWALSTC-AS, SA
 30036        2259        2604  MEDIACOM-ENTERPRISE-BUSINESS, US
 11830        1924        2469  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      2:1022      3:147       4:18        5:3709      6:100    
   7:5         8:1556      9:1        11:172      12:1706     13:407    
  14:2301     15:133      16:32       17:374      18:130      20:142    
  21:4        22:188      23:5325     24:2372     25:4        27:2552   
  29:19       31:2374     32:106      34:1        35:48       36:1726   
  37:3918     38:2381     39:659      40:149      41:3870     42:1041   
  43:2081     44:294      45:15643    46:3697     47:321      49:1661   
  50:1885     51:104      52:1343     54:290      55:725      56:4      
  57:55       58:1747     59:1130     60:940      61:2246     62:2395   
  63:1956     64:5402     65:2349     66:4914     67:2903     68:1184   
  69:4147     70:1343     71:676      72:3097     74:2613     75:1502   
  76:710      77:2137     78:1752     79:2706     80:1878     81:1489   
  82:1420     83:1176     84:1302     85:2819     86:700      87:1886   
  88:978      89:3117     90:478      91:7486     92:1886     93:2584   
  94:3219     95:3604     96:1301     97:342      98:985      99:899    
 100:76      101:1052    102:1814    103:27485   104:4078    105:429    
 106:844     107:2383    108:754     109:4003    110:2067    111:3140   
 112:1965    113:1519    114:1541    115:1939    116:1888    117:2467   
 118:2303    119:1844    120:1614    121:1042    122:2547    123:2136   
 124:1600    125:2047    128:1377    129:1114    130:915     131:2074   
 132:752     133:364     134:1919    135:287     136:792     137:861    
 138:2445    139:1206    140:814     141:1318    142:1231    143:1372   
 144:1256    145:330     146:1706    147:1465    148:2222    149:1579   
 150:852     151:1066    152:1655    153:443     154:3367    155:1352   
 156:1840    157:1197    158:987     159:2016    160:2329    161:1272   
 162:3408    163:1178    164:1658    165:1505    166:615     167:1662   
 168:3638    169:681     170:4309    171:807     172:2858    173:3052   
 174:1007    175:1143    176:3428    177:4489    178:3003    179:1951   
 180:2264    181:2656    182:3159    183:1925    184:2412    185:19066  
 186:4250    187:3515    188:3500    189:3086    190:8739    191:1333   
 192:11021   193:8460    194:6888    195:4957    196:2924    197:2354   
 198:6011    199:6005    200:7405    201:5547    202:10485   203:10020  
 204:4509    205:3371    206:3856    207:3361    208:4008    209:4633   
 210:4217    211:2416    212:3877    213:3406    214:1161    215:62     
 216:6394    217:2603    218:1214    219:621     220:1955    221:985    
 222:850     223:2119   

End of report


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