[SANOG] Weekly Global IPv4 Routing Table Report

Routing Table Analysis Role Account cscora at apnic.net
Fri Dec 10 18:03:00 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 11 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:                              873510
    Prefixes after maximum aggregation (per Origin AS):          330896
    Deaggregation factor:                                          2.64
    Unique aggregates announced (without unneeded subnets):      422751
    Number of IPv4 prefixes with ROAs (including AS0):           250812
Total ASes present in the Internet Routing Table:                 72430
    Prefixes per ASN:                                             12.06
Origin-only ASes present in the Internet Routing Table:           62186
Origin ASes announcing only one prefix:                           25663
Transit ASes present in the Internet Routing Table:               10244
Transit-only ASes present in the Internet Routing Table:            361
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:               951
    Number of instances of unregistered ASNs:                       953
Number of 32-bit ASNs allocated by the RIRs:                      38043
Number of 32-bit ASNs visible in the Routing Table:               31579
Prefixes from 32-bit ASNs in the Routing Table:                  145981
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:            881
Number of addresses announced to Internet:                   3073123072
    Equivalent to 183 /8s, 44 /16s and 35 /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:                   231546
    Total APNIC prefixes after maximum aggregation:               64977
    APNIC Deaggregation factor:                                    3.56
Prefixes being announced from the APNIC address blocks:          226604
    Unique aggregates announced from the APNIC address blocks:    93274
APNIC Region origin ASes present in the Internet Routing Table:   12166
    APNIC Prefixes per ASN:                                       18.63
APNIC Region origin ASes announcing only one prefix:               3471
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:   7347
Number of APNIC addresses announced to Internet:              773409408
    Equivalent to 46 /8s, 25 /16s and 74 /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:                    256989
    Total ARIN prefixes after maximum aggregation:               118604
    ARIN Deaggregation factor:                                     2.17
Prefixes being announced from the ARIN address blocks:           256687
    Unique aggregates announced from the ARIN address blocks:    122502
ARIN Region origin ASes present in the Internet Routing Table:    18933
    ARIN Prefixes per ASN:                                        13.56
ARIN Region origin ASes announcing only one prefix:                6858
ARIN Region transit ASes present in the Internet Routing Table:    1952
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:    4249
Number of ARIN addresses announced to Internet:              1300858112
    Equivalent to 77 /8s, 137 /16s and 133 /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:                    243685
    Total RIPE prefixes after maximum aggregation:               114180
    RIPE Deaggregation factor:                                     2.13
Prefixes being announced from the RIPE address blocks:           239857
    Unique aggregates announced from the RIPE address blocks:    147277
RIPE Region origin ASes present in the Internet Routing Table:    28167
    RIPE Prefixes per ASN:                                         8.52
RIPE Region origin ASes announcing only one prefix:               12145
RIPE Region transit ASes present in the Internet Routing Table:    3922
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:   10567
Number of RIPE addresses announced to Internet:               713617024
    Equivalent to 42 /8s, 136 /16s and 238 /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:                  113110
    Total LACNIC prefixes after maximum aggregation:              27140
    LACNIC Deaggregation factor:                                   4.17
Prefixes being announced from the LACNIC address blocks:         113933
    Unique aggregates announced from the LACNIC address blocks:   47566
LACNIC Region origin ASes present in the Internet Routing Table:  10822
    LACNIC Prefixes per ASN:                                      10.53
LACNIC Region origin ASes announcing only one prefix:              2638
LACNIC Region transit ASes present in the Internet Routing Table:  2157
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:  8503
Number of LACNIC addresses announced to Internet:             176373504
    Equivalent to 10 /8s, 131 /16s and 63 /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:                  27229
    Total AfriNIC prefixes after maximum aggregation:              5279
    AfriNIC Deaggregation factor:                                  5.16
Prefixes being announced from the AfriNIC address blocks:         35548
    Unique aggregates announced from the AfriNIC address blocks:  11330
AfriNIC Region origin ASes present in the Internet Routing Table:  1584
    AfriNIC Prefixes per ASN:                                     22.44
AfriNIC Region origin ASes announcing only one prefix:              551
AfriNIC Region transit ASes present in the Internet Routing Table:  316
Average AfriNIC Region AS path length visible:                      5.1
    Max AfriNIC Region AS path length visible:                       27
Number of AfriNIC region 32-bit ASNs visible in the Routing Table:  913
Number of AfriNIC addresses announced to Internet:            108281600
    Equivalent to 6 /8s, 116 /16s and 63 /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        8756       9000      57  CHINAMOBILE-CN China Mobile Communicati
  7545        5859        787     683  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4693       4192      74  ERX-CERNET-BKB China Education and Rese
  7552        3536       1330      20  VIETEL-AS-AP Viettel Group, VN
  7713        3484       1022      56  TELKOMNET-AS-AP PT Telekomunikasi Indon
 45899        3248       1896      54  VNPT-AS-VN VNPT Corp, VN
  4766        2480      11119     578  KIXS-AS-KR Korea Telecom, KR
  9498        2193        475     236  BBIL-AP BHARTI Airtel Ltd., IN
 45090        2137       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        5995      10072    2563  AMAZON-02, US
 11492        4583        304     817  CABLEONE, US
 22773        4042       3046     395  ASN-CXA-ALL-CCI-22773-RDC, US
  7155        3950        264      30  VIASAT-SP-BACKBONE, US
 16625        3648       1879    2540  AKAMAI-AS, US
  6327        3390       1318      64  SHAW, CA
   749        2890      50784    2146  DNIC-AS-00749, US
 30036        2600        374     168  MEDIACOM-ENTERPRISE-BUSINESS, US
   209        2521       5043     433  CENTURYLINK-US-LEGACY-QWEST, US
 20115        2237       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        6827       1733     150  UNI2-AS, ES
 20940        3862       3348     210  AKAMAI-ASN1, NL
  8551        3496        378      39  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
 39891        3271        187      23  ALJAWWALSTC-AS, SA
 12389        2933       2279     896  ROSTELECOM-AS, RU
  9009        2626        276    1392  M247, GB
 34984        2205        355     597  TELLCOM-AS, TR
 58224        1762        919     581  TCI, IR
 13188        1609        100      27  TRIOLAN, UA
 61317        1545        212     902  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       10546       3450     580  Uninet S.A. de C.V., MX
 10620        3251        491     832  Telmex Colombia S.A., CO
 11830        2466        369      62  Instituto Costarricense de Electricidad
 13999        1627        288     460  Mega Cable, S.A. de C.V., MX
  6503        1435        355     522  Axtel, S.A.B. de C.V., MX
 28573        1392       2319     263  CLARO S.A., BR
  3816        1242        654     150  COLOMBIA TELECOMUNICACIONES S.A. ESP, C
 26615        1133       2350     136  TIM SA, BR
  6147        1087        370      21  Telefonica del Peru S.A.A., PE
 11664         989        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        1548        499      32  RAYA-AS, EG
 36992        1286       1430     268  ETISALAT-MISR, EG
 36903        1195        543     114  MT-MPLS, MA
 29571         827         68      11  ORANGE-COTE-IVOIRE, CI
 36935         685        521      39  Vodafone-, EG
  6713         612       1863      34  IAM-AS, MA
 15399         517         50      32  WANANCHI-, KE
 37342         462         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       10546       3450     580  Uninet S.A. de C.V., MX
  9808        8756       9000      57  CHINAMOBILE-CN China Mobile Communicati
 12479        6827       1733     150  UNI2-AS, ES
 16509        5995      10072    2563  AMAZON-02, US
  7545        5859        787     683  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4693       4192      74  ERX-CERNET-BKB China Education and Rese
 11492        4583        304     817  CABLEONE, US
 22773        4042       3046     395  ASN-CXA-ALL-CCI-22773-RDC, US
  7155        3950        264      30  VIASAT-SP-BACKBONE, US
 20940        3862       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        8756         8699  CHINAMOBILE-CN China Mobile Communications Grou
 12479        6827         6677  UNI2-AS, ES
  7545        5859         5176  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4693         4619  ERX-CERNET-BKB China Education and Research Net
  7155        3950         3920  VIASAT-SP-BACKBONE, US
 11492        4583         3766  CABLEONE, US
 20940        3862         3652  AKAMAI-ASN1, NL
 22773        4042         3647  ASN-CXA-ALL-CCI-22773-RDC, US
  7552        3536         3516  VIETEL-AS-AP Viettel Group, VN
  8551        3496         3457  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     
/13:596     /14:1214    /15:2044    /16:13554   /17:8316    /18:13913   
/19:25209   /20:43164   /21:51090   /22:107665  /23:93875   /24:511619  
/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        5763        6827  UNI2-AS, ES
  8151        4371       10546  Uninet S.A. de C.V., MX
 11492        3536        4583  CABLEONE, US
  6327        3199        3390  SHAW, CA
  7155        3040        3950  VIASAT-SP-BACKBONE, US
 22773        3006        4042  ASN-CXA-ALL-CCI-22773-RDC, US
  8551        2961        3496  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
 39891        2807        3271  ALJAWWALSTC-AS, SA
 30036        2255        2600  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)
----------------------------------------------

   1:1915      2:1015      3:147       4:18        5:3697      6:102    
   7:5         8:1557      9:1        11:172      12:1703     13:408    
  14:2303     15:133      16:34       17:375      18:129      20:142    
  21:4        22:188      23:5341     24:2361     25:2        27:2563   
  29:19       31:2404     32:106      34:1        35:49       36:1720   
  37:3917     38:2392     39:657      40:148      41:3896     42:1034   
  43:2081     44:294      45:15678    46:3713     47:321      49:1640   
  50:1891     51:104      52:1344     54:286      55:717      56:4      
  57:55       58:1753     59:1134     60:947      61:2235     62:2406   
  63:1953     64:5396     65:2348     66:4925     67:2926     68:1183   
  69:4145     70:1343     71:676      72:3098     74:2613     75:1502   
  76:710      77:2137     78:1743     79:2749     80:1887     81:1492   
  82:1422     83:1183     84:1315     85:2812     86:691      87:1898   
  88:983      89:3100     90:478      91:7517     92:1873     93:2562   
  94:3234     95:3599     96:1303     97:343      98:985      99:894    
 100:75      101:1052    102:1829    103:27727   104:4104    105:433    
 106:845     107:2404    108:754     109:4010    110:2064    111:3143   
 112:1964    113:1513    114:1549    115:1938    116:1892    117:2480   
 118:2308    119:1854    120:1617    121:1041    122:2546    123:2134   
 124:1601    125:2053    128:1387    129:1114    130:903     131:2068   
 132:724     133:365     134:1928    135:289     136:832     137:864    
 138:2445    139:1204    140:852     141:1329    142:1237    143:1415   
 144:1266    145:330     146:1718    147:1480    148:2224    149:1584   
 150:851     151:1068    152:1658    153:445     154:3553    155:1359   
 156:1870    157:1203    158:991     159:2011    160:2362    161:1275   
 162:3415    163:1182    164:1660    165:1510    166:621     167:1675   
 168:3657    169:682     170:4307    171:811     172:2896    173:3048   
 174:1003    175:1121    176:3433    177:4509    178:3005    179:1958   
 180:2267    181:2633    182:3177    183:1918    184:2411    185:19108  
 186:4255    187:3476    188:3497    189:3089    190:8771    191:1324   
 192:11016   193:8459    194:6894    195:4969    196:2916    197:2353   
 198:5998    199:5988    200:7424    201:5680    202:10495   203:9983   
 204:4499    205:3401    206:3847    207:3366    208:4009    209:4593   
 210:4217    211:2412    212:3889    213:3367    214:1160    215:64     
 216:6399    217:2607    218:1218    219:621     220:1969    221:986    
 222:849     223:2139   

End of report


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