[SANOG] Weekly Global IPv4 Routing Table Report

Routing Table Analysis Role Account cscora at apnic.net
Fri Dec 17 18:02:59 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 18 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:                              873825
    Prefixes after maximum aggregation (per Origin AS):          331399
    Deaggregation factor:                                          2.64
    Unique aggregates announced (without unneeded subnets):      423810
    Number of IPv4 prefixes with ROAs (including AS0):           252218
Total ASes present in the Internet Routing Table:                 72436
    Prefixes per ASN:                                             12.06
Origin-only ASes present in the Internet Routing Table:           62181
Origin ASes announcing only one prefix:                           25683
Transit ASes present in the Internet Routing Table:               10255
Transit-only ASes present in the Internet Routing Table:            354
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:               910
    Number of instances of unregistered ASNs:                       912
Number of 32-bit ASNs allocated by the RIRs:                      38109
Number of 32-bit ASNs visible in the Routing Table:               31625
Prefixes from 32-bit ASNs in the Routing Table:                  146124
Number of bogon 32-bit ASNs visible in the Routing Table:            20
Special use prefixes present in the Routing Table:                    1
Prefixes being announced from unallocated address space:            822
Number of addresses announced to Internet:                   3072898560
    Equivalent to 183 /8s, 40 /16s and 182 /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:      291073

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

Prefixes being announced by APNIC Region ASes:                   231564
    Total APNIC prefixes after maximum aggregation:               65083
    APNIC Deaggregation factor:                                    3.56
Prefixes being announced from the APNIC address blocks:          226652
    Unique aggregates announced from the APNIC address blocks:    93227
APNIC Region origin ASes present in the Internet Routing Table:   12159
    APNIC Prefixes per ASN:                                       18.64
APNIC Region origin ASes announcing only one prefix:               3463
APNIC Region transit ASes present in the Internet Routing Table:   1711
Average APNIC Region AS path length visible:                        4.5
    Max APNIC Region AS path length visible:                         27
Number of APNIC region 32-bit ASNs visible in the Routing Table:   7347
Number of APNIC addresses announced to Internet:              773210752
    Equivalent to 46 /8s, 22 /16s and 66 /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:                    256959
    Total ARIN prefixes after maximum aggregation:               118517
    ARIN Deaggregation factor:                                     2.17
Prefixes being announced from the ARIN address blocks:           256474
    Unique aggregates announced from the ARIN address blocks:    122426
ARIN Region origin ASes present in the Internet Routing Table:    18920
    ARIN Prefixes per ASN:                                        13.56
ARIN Region origin ASes announcing only one prefix:                6851
ARIN Region transit ASes present in the Internet Routing Table:    1949
Average ARIN Region AS path length visible:                         3.8
    Max ARIN Region AS path length visible:                          34
Number of ARIN region 32-bit ASNs visible in the Routing Table:    4251
Number of ARIN addresses announced to Internet:              1300753408
    Equivalent to 77 /8s, 135 /16s and 236 /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:                    243933
    Total RIPE prefixes after maximum aggregation:               114563
    RIPE Deaggregation factor:                                     2.13
Prefixes being announced from the RIPE address blocks:           240345
    Unique aggregates announced from the RIPE address blocks:    148218
RIPE Region origin ASes present in the Internet Routing Table:    28174
    RIPE Prefixes per ASN:                                         8.53
RIPE Region origin ASes announcing only one prefix:               12161
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:   10578
Number of RIPE addresses announced to Internet:               713781888
    Equivalent to 42 /8s, 139 /16s and 114 /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:                  113116
    Total LACNIC prefixes after maximum aggregation:              27295
    LACNIC Deaggregation factor:                                   4.14
Prefixes being announced from the LACNIC address blocks:         113897
    Unique aggregates announced from the LACNIC address blocks:   47774
LACNIC Region origin ASes present in the Internet Routing Table:  10861
    LACNIC Prefixes per ASN:                                      10.49
LACNIC Region origin ASes announcing only one prefix:              2659
LACNIC Region transit ASes present in the Internet Routing Table:  2170
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:  8538
Number of LACNIC addresses announced to Internet:             176279040
    Equivalent to 10 /8s, 129 /16s and 206 /24s
LACNIC AS Blocks       26592-26623, 27648-28671, 52224-53247,
                       61440-61951, 64099-64197, 262144-273820 + 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:                  27343
    Total AfriNIC prefixes after maximum aggregation:              5256
    AfriNIC Deaggregation factor:                                  5.20
Prefixes being announced from the AfriNIC address blocks:         35635
    Unique aggregates announced from the AfriNIC address blocks:  11423
AfriNIC Region origin ASes present in the Internet Routing Table:  1581
    AfriNIC Prefixes per ASN:                                     22.54
AfriNIC Region origin ASes announcing only one prefix:              549
AfriNIC Region transit ASes present in the Internet Routing Table:  311
Average AfriNIC Region AS path length visible:                      5.1
    Max AfriNIC Region AS path length visible:                       28
Number of AfriNIC region 32-bit ASNs visible in the Routing Table:  911
Number of AfriNIC addresses announced to Internet:            108313088
    Equivalent to 6 /8s, 116 /16s and 186 /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        8759       9000      57  CHINAMOBILE-CN China Mobile Communicati
  7545        5838        787     681  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4691       4192      74  ERX-CERNET-BKB China Education and Rese
  7552        3588       1330      20  VIETEL-AS-AP Viettel Group, VN
  7713        3483       1022      55  TELKOMNET-AS-AP PT Telekomunikasi Indon
 45899        3249       1896      54  VNPT-AS-VN VNPT Corp, VN
  4766        2480      11119     578  KIXS-AS-KR Korea Telecom, KR
  9498        2215        475     236  BBIL-AP BHARTI Airtel Ltd., IN
 45090        2136       1198      75  TENCENT-NET-AP Shenzhen Tencent Compute
  4755        2123        429     204  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        6043      10081    2593  AMAZON-02, US
 11492        4555        302     849  CABLEONE, US
 22773        4032       3036     389  ASN-CXA-ALL-CCI-22773-RDC, US
  7155        3950        264      30  VIASAT-SP-BACKBONE, US
 16625        3660       1887    2548  AKAMAI-AS, US
  6327        3391       1319      65  SHAW, CA
   749        2890      50784    2146  DNIC-AS-00749, US
 30036        2604        374     140  MEDIACOM-ENTERPRISE-BUSINESS, US
   209        2524       5043     432  CENTURYLINK-US-LEGACY-QWEST, US
 20115        2237       3033     503  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        6844       1733     150  UNI2-AS, ES
 20940        3866       3348     210  AKAMAI-ASN1, NL
  8551        3495        378      39  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
 39891        3271        187      23  ALJAWWALSTC-AS, SA
 12389        2938       2281     892  ROSTELECOM-AS, RU
  9009        2606        274    1390  M247, GB
 34984        2204        355     600  TELLCOM-AS, TR
 58224        1759        919     576  TCI, IR
 13188        1609        100      27  TRIOLAN, UA
 61317        1585        213     922  ASDETUK www.heficed.com, GB

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       10557       3450     581  Uninet S.A. de C.V., MX
 10620        3256        491     831  Telmex Colombia S.A., CO
 11830        2466        369      62  Instituto Costarricense de Electricidad
 13999        1636        283     461  Mega Cable, S.A. de C.V., MX
  6503        1436        355     522  Axtel, S.A.B. de C.V., MX
 28573        1400       2324     258  CLARO S.A., BR
  3816        1244        657     147  COLOMBIA TELECOMUNICACIONES S.A. ESP, C
 26615        1140       2350     138  TIM SA, BR
  6147        1091        370      21  Telefonica del Peru S.A.A., PE
 11664         993        190     443  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        1626        393      21  LINKdotNET-AS, EG
 24835        1546        499      32  RAYA-AS, EG
 36992        1286       1430     268  ETISALAT-MISR, EG
 36903        1195        543     114  MT-MPLS, MA
 29571         852         68      11  ORANGE-COTE-IVOIRE, CI
 36935         685        521      39  Vodafone-, EG
  6713         612       1863      34  IAM-AS, MA
 15399         515         50      32  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       10557       3450     581  Uninet S.A. de C.V., MX
  9808        8759       9000      57  CHINAMOBILE-CN China Mobile Communicati
 12479        6844       1733     150  UNI2-AS, ES
 16509        6043      10081    2593  AMAZON-02, US
  7545        5838        787     681  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4691       4192      74  ERX-CERNET-BKB China Education and Rese
 11492        4555        302     849  CABLEONE, US
 22773        4032       3036     389  ASN-CXA-ALL-CCI-22773-RDC, US
  7155        3950        264      30  VIASAT-SP-BACKBONE, US
 20940        3866       3348     210  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        8759         8702  CHINAMOBILE-CN China Mobile Communications Grou
 12479        6844         6694  UNI2-AS, ES
  7545        5838         5157  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4691         4617  ERX-CERNET-BKB China Education and Research Net
  7155        3950         3920  VIASAT-SP-BACKBONE, US
 11492        4555         3706  CABLEONE, US
 20940        3866         3656  AKAMAI-ASN1, NL
 22773        4032         3643  ASN-CXA-ALL-CCI-22773-RDC, US
  7552        3588         3568  VIETEL-AS-AP Viettel Group, VN
  8551        3495         3456  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo

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

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     
/13:594     /14:1212    /15:2043    /16:13560   /17:8322    /18:13911   
/19:25209   /20:43139   /21:51159   /22:107703  /23:93918   /24:511804  
/25:776     /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        5779        6844  UNI2-AS, ES
  8151        4382       10557  Uninet S.A. de C.V., MX
 11492        3508        4555  CABLEONE, US
  6327        3199        3391  SHAW, CA
  7155        3040        3950  VIASAT-SP-BACKBONE, US
 22773        3006        4032  ASN-CXA-ALL-CCI-22773-RDC, US
  8551        2960        3495  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
 39891        2807        3271  ALJAWWALSTC-AS, SA
 30036        2259        2604  MEDIACOM-ENTERPRISE-BUSINESS, US
 11830        1921        2466  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)
----------------------------------------------

   1:1900      2:1012      3:148       4:18        5:3676      6:102    
   7:5         8:1545      9:1        11:172      12:1701     13:408    
  14:2305     15:135      16:34       17:374      18:130      20:143    
  21:4        22:188      23:5350     24:2354     25:2        27:2573   
  29:19       31:2416     32:106      34:1        35:49       36:1729   
  37:3907     38:2411     39:695      40:148      41:3921     42:1038   
  43:2091     44:294      45:15699    46:3731     47:298      49:1629   
  50:1895     51:106      52:1348     54:288      55:738      56:4      
  57:56       58:1750     59:1135     60:947      61:2240     62:2410   
  63:1945     64:5408     65:2334     66:4935     67:2918     68:1183   
  69:4138     70:1339     71:676      72:3060     74:2614     75:1506   
  76:711      77:2130     78:1786     79:2765     80:1892     81:1507   
  82:1418     83:1184     84:1320     85:2830     86:702      87:1898   
  88:1006     89:3099     90:492      91:7518     92:1886     93:2570   
  94:3250     95:3597     96:1291     97:344      98:987      99:879    
 100:75      101:1049    102:1838    103:27753   104:4088    105:442    
 106:847     107:2411    108:748     109:3978    110:2065    111:3170   
 112:1940    113:1494    114:1556    115:1947    116:1879    117:2483   
 118:2303    119:1856    120:1627    121:1010    122:2515    123:2116   
 124:1603    125:2033    128:1381    129:1117    130:904     131:2073   
 132:753     133:365     134:1924    135:288     136:846     137:866    
 138:2443    139:1204    140:855     141:1334    142:1235    143:1403   
 144:1229    145:332     146:1733    147:1429    148:2212    149:1570   
 150:863     151:1073    152:1670    153:445     154:3563    155:1360   
 156:1876    157:1220    158:991     159:2007    160:2368    161:1264   
 162:3411    163:1185    164:1651    165:1537    166:621     167:1677   
 168:3643    169:677     170:4299    171:813     172:2913    173:3041   
 174:1002    175:1115    176:3432    177:4495    178:3008    179:1973   
 180:2278    181:2668    182:3198    183:1922    184:2416    185:19136  
 186:4238    187:3496    188:3502    189:3124    190:8779    191:1289   
 192:11011   193:8487    194:6929    195:4982    196:2918    197:2339   
 198:5998    199:5974    200:7376    201:5657    202:10461   203:10005  
 204:4509    205:3392    206:3855    207:3359    208:3985    209:4596   
 210:4208    211:2413    212:3899    213:3360    214:1154    215:64     
 216:6394    217:2673    218:1211    219:609     220:1964    221:985    
 222:845     223:2134   

End of report


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