[SANOG] Weekly Global IPv4 Routing Table Report

Routing Table Analysis Role Account cscora at apnic.net
Fri Feb 18 18:02:53 UTC 2022


This is an automated weekly mailing describing the state of the Global
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>.

IPv4 Routing Table Report   04:00 +10GMT Sat 19 Feb, 2022

  BGP Table (Global) as seen in Japan.

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

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

BGP routing table entries examined:                              888099
    Prefixes after maximum aggregation (per Origin AS):          335036
    Deaggregation factor:                                          2.65
    Unique aggregates announced (without unneeded subnets):      427841
Total ASes present in the Internet Routing Table:                 72856
    Prefixes per ASN:                                             12.19
Origin-only ASes present in the Internet Routing Table:           62489
Origin ASes announcing only one prefix:                           25791
Transit ASes present in the Internet Routing Table:               10367
Transit-only ASes present in the Internet Routing Table:            378
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:               945
    Number of instances of unregistered ASNs:                       949
Number of 32-bit ASNs allocated by the RIRs:                      38594
Number of 32-bit ASNs visible in the Routing Table:               32152
Prefixes from 32-bit ASNs in the Routing Table:                  150010
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:            523
Number of addresses announced to Internet:                   3068725632
    Equivalent to 182 /8s, 233 /16s and 9 /24s
    Percentage of available address space announced:               82.9
    Percentage of allocated address space announced:               82.9
    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:      300697

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

Prefixes being announced by APNIC Region ASes:                   232657
    Total APNIC prefixes after maximum aggregation:               65852
    APNIC Deaggregation factor:                                    3.53
Prefixes being announced from the APNIC address blocks:          227464
    Unique aggregates announced from the APNIC address blocks:    94149
APNIC Region origin ASes present in the Internet Routing Table:   12389
    APNIC Prefixes per ASN:                                       18.36
APNIC Region origin ASes announcing only one prefix:               3556
APNIC Region transit ASes present in the Internet Routing Table:   1715
Average APNIC Region AS path length visible:                        4.5
    Max APNIC Region AS path length visible:                         29
Number of APNIC region 32-bit ASNs visible in the Routing Table:   7585
Number of APNIC addresses announced to Internet:              773730816
    Equivalent to 46 /8s, 30 /16s and 50 /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:                    258735
    Total ARIN prefixes after maximum aggregation:               119151
    ARIN Deaggregation factor:                                     2.17
Prefixes being announced from the ARIN address blocks:           258933
    Unique aggregates announced from the ARIN address blocks:    123539
ARIN Region origin ASes present in the Internet Routing Table:    18984
    ARIN Prefixes per ASN:                                        13.64
ARIN Region origin ASes announcing only one prefix:                6895
ARIN Region transit ASes present in the Internet Routing Table:    1960
Average ARIN Region AS path length visible:                         3.8
    Max ARIN Region AS path length visible:                          32
Number of ARIN region 32-bit ASNs visible in the Routing Table:    4356
Number of ARIN addresses announced to Internet:              1295998464
    Equivalent to 77 /8s, 63 /16s and 94 /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:                    254187
    Total RIPE prefixes after maximum aggregation:               116585
    RIPE Deaggregation factor:                                     2.18
Prefixes being announced from the RIPE address blocks:           250651
    Unique aggregates announced from the RIPE address blocks:    149300
RIPE Region origin ASes present in the Internet Routing Table:    28187
    RIPE Prefixes per ASN:                                         8.89
RIPE Region origin ASes announcing only one prefix:               12128
RIPE Region transit ASes present in the Internet Routing Table:    3981
Average RIPE Region AS path length visible:                         4.3
    Max RIPE Region AS path length visible:                          32
Number of RIPE region 32-bit ASNs visible in the Routing Table:   10661
Number of RIPE addresses announced to Internet:               713880704
    Equivalent to 42 /8s, 140 /16s and 244 /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:                  114057
    Total LACNIC prefixes after maximum aggregation:              27367
    LACNIC Deaggregation factor:                                   4.17
Prefixes being announced from the LACNIC address blocks:         114744
    Unique aggregates announced from the LACNIC address blocks:   48538
LACNIC Region origin ASes present in the Internet Routing Table:  10938
    LACNIC Prefixes per ASN:                                      10.49
LACNIC Region origin ASes announcing only one prefix:              2661
LACNIC Region transit ASes present in the Internet Routing Table:  2221
Average LACNIC Region AS path length visible:                       4.9
    Max LACNIC Region AS path length visible:                        53
Number of LACNIC region 32-bit ASNs visible in the Routing Table:  8621
Number of LACNIC addresses announced to Internet:             176610816
    Equivalent to 10 /8s, 134 /16s and 222 /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:                  27518
    Total AfriNIC prefixes after maximum aggregation:              5371
    AfriNIC Deaggregation factor:                                  5.12
Prefixes being announced from the AfriNIC address blocks:         35784
    Unique aggregates announced from the AfriNIC address blocks:  11855
AfriNIC Region origin ASes present in the Internet Routing Table:  1595
    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:  314
Average AfriNIC Region AS path length visible:                      5.2
    Max AfriNIC Region AS path length visible:                       34
Number of AfriNIC region 32-bit ASNs visible in the Routing Table:  929
Number of AfriNIC addresses announced to Internet:            108180224
    Equivalent to 6 /8s, 114 /16s and 179 /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        9066       8886      46  CHINAMOBILE-CN China Mobile Communicati
  7545        5874        788     691  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4681       4192      74  ERX-CERNET-BKB China Education and Rese
  7552        3603       1330      19  VIETEL-AS-AP Viettel Group, VN
  7713        3488       1038      51  TELKOMNET-AS-AP PT Telekomunikasi Indon
 45899        3434       1880      57  VNPT-AS-VN VNPT Corp, VN
  4766        2557      11123     631  KIXS-AS-KR Korea Telecom, KR
  9498        2379        475     238  BBIL-AP BHARTI Airtel Ltd., IN
 45090        2170       1438      79  TENCENT-NET-AP Shenzhen Tencent Compute
  4755        2113        429     198  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        6277      10186    2660  AMAZON-02, US
 11492        4437        294     747  CABLEONE, US
 22773        3957       3028     367  ASN-CXA-ALL-CCI-22773-RDC, US
  7155        3899        264      31  VIASAT-SP-BACKBONE, US
 16625        3650       1883    2566  AKAMAI-AS, US
  6327        3382       1318      62  SHAW, CA
   749        2887      50780    2143  DNIC-AS-00749, US
 30036        2617        375     123  MEDIACOM-ENTERPRISE-BUSINESS, US
   209        2520       4962     428  CENTURYLINK-US-LEGACY-QWEST, US
 20115        2255       3037     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        6805       1731     150  UNI2-AS, ES
  9121        6754       1692      17  TTNET, TR
  8551        4014        378      39  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
 20940        3891       3347     207  AKAMAI-ASN1, NL
 39891        3274        188      25  ALJAWWALSTC-AS, SA
 12389        2962       2290     910  ROSTELECOM-AS, RU
  9009        2464        249    1282  M247, GB
 34984        2240        359     605  TELLCOM-AS, TR
 47331        1957        313    1494  TTNET, TR
 58224        1791        929     579  TCI, IR

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       10310       3415     566  Uninet S.A. de C.V., MX
 10620        3467        519     705  Telmex Colombia S.A., CO
 11830        2457        369      62  Instituto Costarricense de Electricidad
 13999        1668        285     474  Mega Cable, S.A. de C.V., MX
  6503        1442        354     524  Axtel, S.A.B. de C.V., MX
 28573        1397       2330     246  CLARO S.A., BR
  3816        1251        660     146  COLOMBIA TELECOMUNICACIONES S.A. ESP, C
 26615        1152       2351     140  TIM SA, BR
  6147        1091        369      21  Telefonica del Peru S.A.A., PE
 11664         999        191     448  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        1589        393      21  LINKdotNET-AS, EG
 24835        1546        523      32  RAYA-AS, EG
 36992        1299       1518     262  ETISALAT-MISR, EG
 36903        1199        545     114  MT-MPLS, MA
 29571         896         63      58  ORANGE-COTE-IVOIRE, CI
 36935         734        521      39  Vodafone-, EG
  6713         612       1863      34  IAM-AS, MA
 15399         519         50      33  WANANCHI-, KE
 37342         468         32       1  MOVITEL, MZ
 23889         422        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       10310       3415     566  Uninet S.A. de C.V., MX
  9808        9066       8886      46  CHINAMOBILE-CN China Mobile Communicati
 12479        6805       1731     150  UNI2-AS, ES
  9121        6754       1692      17  TTNET, TR
 16509        6277      10186    2660  AMAZON-02, US
  7545        5874        788     691  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4681       4192      74  ERX-CERNET-BKB China Education and Rese
 11492        4437        294     747  CABLEONE, US
  8551        4014        378      39  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
 22773        3957       3028     367  ASN-CXA-ALL-CCI-22773-RDC, US

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

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

   ASN  No of nets  Net Savings  Description
  9808        9066         9020  CHINAMOBILE-CN China Mobile Communications Grou
  9121        6754         6737  TTNET, TR
 12479        6805         6655  UNI2-AS, ES
  7545        5874         5183  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4681         4607  ERX-CERNET-BKB China Education and Research Net
  8551        4014         3975  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
  7155        3899         3868  VIASAT-SP-BACKBONE, US
 11492        4437         3690  CABLEONE, US
 20940        3891         3684  AKAMAI-ASN1, NL
 16509        6277         3617  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            22442  HOU-PHONOSCOPE, US
     54338  UNALLOCATED  8.33.241.0/24             6461  ZAYO-6461, 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
     17033  UNALLOCATED  8.48.225.0/24             3356  LEVEL3, US

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

Prefixes from the Special Purpose Address Registry (Global)
-----------------------------------------------------------

Prefix                Origin AS  Description
192.88.99.0/24             6939  HURRICANE, US

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

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:       174  COGENT-174, US
23.252.161.0/24      Origin:    398968  GROUP-IID-01, US
23.252.161.0/24     Transit:       174  COGENT-174, US
23.252.163.0/24      Origin:    398968  GROUP-IID-01, US
23.252.163.0/24     Transit:       174  COGENT-174, US
23.252.164.0/24      Origin:    398968  GROUP-IID-01, US
23.252.164.0/24     Transit:       174  COGENT-174, US

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      /10:40      /11:102     /12:305     
/13:591     /14:1205    /15:2030    /16:13580   /17:8357    /18:13898   
/19:25191   /20:43092   /21:52309   /22:108398  /23:95274   /24:522901  
/25:797     /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
  9121        5913        6754  TTNET, TR
 12479        5774        6805  UNI2-AS, ES
  8151        3976       10310  Uninet S.A. de C.V., MX
  8551        3479        4014  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
 11492        3357        4437  CABLEONE, US
  6327        3194        3382  SHAW, CA
  7155        2989        3899  VIASAT-SP-BACKBONE, US
 22773        2950        3957  ASN-CXA-ALL-CCI-22773-RDC, US
 39891        2810        3274  ALJAWWALSTC-AS, SA
 30036        2272        2617  MEDIACOM-ENTERPRISE-BUSINESS, US

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

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

   1:1667      2:992       3:153       4:7         5:3793      6:103    
   7:5         8:1559      9:1        11:172      12:1718     13:415    
  14:2378     15:166      16:43       17:373      18:140      20:167    
  21:4        22:188      23:5492     24:2302     25:6        27:2608   
  29:19       31:2432     32:96       34:1        35:60       36:1728   
  37:3945     38:2567     39:687      40:149      41:3914     42:765    
  43:2094     44:292      45:16001    46:3896     47:336      49:1643   
  50:1916     51:107      52:1367     53:1        54:294      55:768    
  56:8        57:55       58:1765     59:1181     60:958      61:2274   
  62:2450     63:1941     64:5506     65:2307     66:4862     67:2939   
  68:1181     69:4170     70:1343     71:668      72:3064     74:2619   
  75:1516     76:717      77:2125     78:3854     79:3106     80:1969   
  81:1667     82:1459     83:1202     84:1340     85:3627     86:717    
  87:1945     88:2649     89:3233     90:510      91:7545     92:1890   
  93:2612     94:3264     95:4485     96:1308     97:346      98:994    
  99:859     100:75      101:1030    102:1965    103:28305   104:4162   
 105:464     106:862     107:2460    108:772     109:4197    110:2056   
 111:3241    112:1978    113:1499    114:1502    115:1950    116:1910   
 117:2511    118:2232    119:1830    120:1666    121:1038    122:2552   
 123:2112    124:1611    125:2111    128:1289    129:1181    130:923    
 131:2084    132:755     133:370     134:1925    135:283     136:857    
 137:863     138:2449    139:1222    140:888     141:1366    142:1256   
 143:1451    144:1229    145:342     146:1775    147:1471    148:2192   
 149:1699    150:860     151:1076    152:1827    153:448     154:3520   
 155:1356    156:1878    157:1229    158:1015    159:2047    160:2396   
 161:1302    162:3451    163:1226    164:1660    165:1569    166:638    
 167:1694    168:3718    169:682     170:4365    171:826     172:3018   
 173:3068    174:1021    175:1115    176:3541    177:4545    178:3039   
 179:1970    180:2278    181:2912    182:3235    183:1897    184:2387   
 185:19339   186:4302    187:3556    188:3849    189:3015    190:8828   
 191:1309    192:11052   193:8526    194:6923    195:4991    196:2922   
 197:2340    198:6008    199:5993    200:7512    201:5656    202:10429  
 203:9977    204:4558    205:3373    206:3793    207:3401    208:4011   
 209:4621    210:4241    211:2454    212:3950    213:3384    214:1156   
 215:64      216:6385    217:2641    218:1247    219:599     220:1950   
 221:987     222:859     223:2170   

End of report


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