[SANOG] Weekly Global IPv4 Routing Table Report

Routing Table Analysis Role Account cscora at apnic.net
Fri Dec 31 18:02:53 UTC 2021


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 01 Jan, 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:                              882085
    Prefixes after maximum aggregation (per Origin AS):          333018
    Deaggregation factor:                                          2.65
    Unique aggregates announced (without unneeded subnets):      424495
    Number of IPv4 prefixes with ROAs (including AS0):           253942
Total ASes present in the Internet Routing Table:                 72558
    Prefixes per ASN:                                             12.16
Origin-only ASes present in the Internet Routing Table:           62287
Origin ASes announcing only one prefix:                           25692
Transit ASes present in the Internet Routing Table:               10271
Transit-only ASes present in the Internet Routing Table:            371
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:               906
    Number of instances of unregistered ASNs:                       910
Number of 32-bit ASNs allocated by the RIRs:                      38216
Number of 32-bit ASNs visible in the Routing Table:               31770
Prefixes from 32-bit ASNs in the Routing Table:                  147228
Number of bogon 32-bit ASNs visible in the Routing Table:            25
Special use prefixes present in the Routing Table:                    1
Prefixes being announced from unallocated address space:            705
Number of addresses announced to Internet:                   3074351616
    Equivalent to 183 /8s, 62 /16s and 226 /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:      297820

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

Prefixes being announced by APNIC Region ASes:                   232361
    Total APNIC prefixes after maximum aggregation:               65312
    APNIC Deaggregation factor:                                    3.56
Prefixes being announced from the APNIC address blocks:          227183
    Unique aggregates announced from the APNIC address blocks:    93516
APNIC Region origin ASes present in the Internet Routing Table:   12239
    APNIC Prefixes per ASN:                                       18.56
APNIC Region origin ASes announcing only one prefix:               3500
APNIC Region transit ASes present in the Internet Routing Table:   1708
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:   7424
Number of APNIC addresses announced to Internet:              774452096
    Equivalent to 46 /8s, 41 /16s and 51 /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:                    257146
    Total ARIN prefixes after maximum aggregation:               118506
    ARIN Deaggregation factor:                                     2.17
Prefixes being announced from the ARIN address blocks:           256894
    Unique aggregates announced from the ARIN address blocks:    122589
ARIN Region origin ASes present in the Internet Routing Table:    18927
    ARIN Prefixes per ASN:                                        13.57
ARIN Region origin ASes announcing only one prefix:                6856
ARIN Region transit ASes present in the Internet Routing Table:    1951
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:    4264
Number of ARIN addresses announced to Internet:              1300549888
    Equivalent to 77 /8s, 132 /16s and 209 /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:                    252604
    Total RIPE prefixes after maximum aggregation:               115966
    RIPE Deaggregation factor:                                     2.18
Prefixes being announced from the RIPE address blocks:           249004
    Unique aggregates announced from the RIPE address blocks:    148410
RIPE Region origin ASes present in the Internet Routing Table:    28156
    RIPE Prefixes per ASN:                                         8.84
RIPE Region origin ASes announcing only one prefix:               12125
RIPE Region transit ASes present in the Internet Routing Table:    3938
Average RIPE Region AS path length visible:                         4.3
    Max RIPE Region AS path length visible:                          32
Number of RIPE region 32-bit ASNs visible in the Routing Table:   10587
Number of RIPE addresses announced to Internet:               713757824
    Equivalent to 42 /8s, 139 /16s and 20 /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:                  111641
    Total LACNIC prefixes after maximum aggregation:              27264
    LACNIC Deaggregation factor:                                   4.09
Prefixes being announced from the LACNIC address blocks:         112434
    Unique aggregates announced from the LACNIC address blocks:   47800
LACNIC Region origin ASes present in the Internet Routing Table:  10893
    LACNIC Prefixes per ASN:                                      10.32
LACNIC Region origin ASes announcing only one prefix:              2662
LACNIC Region transit ASes present in the Internet Routing Table:  2188
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:  8575
Number of LACNIC addresses announced to Internet:             176521472
    Equivalent to 10 /8s, 133 /16s and 129 /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:                  27427
    Total AfriNIC prefixes after maximum aggregation:              5291
    AfriNIC Deaggregation factor:                                  5.18
Prefixes being announced from the AfriNIC address blocks:         35865
    Unique aggregates announced from the AfriNIC address blocks:  11544
AfriNIC Region origin ASes present in the Internet Routing Table:  1585
    AfriNIC Prefixes per ASN:                                     22.63
AfriNIC Region origin ASes announcing only one prefix:              549
AfriNIC Region transit ASes present in the Internet Routing Table:  312
Average AfriNIC Region AS path length visible:                      5.1
    Max AfriNIC Region AS path length visible:                       34
Number of AfriNIC region 32-bit ASNs visible in the Routing Table:  920
Number of AfriNIC addresses announced to Internet:            108618496
    Equivalent to 6 /8s, 121 /16s and 99 /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        8754       9000      57  CHINAMOBILE-CN China Mobile Communicati
  7545        5839        787     681  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4697       4192      74  ERX-CERNET-BKB China Education and Rese
  7552        3608       1330      20  VIETEL-AS-AP Viettel Group, VN
  7713        3482       1038      51  TELKOMNET-AS-AP PT Telekomunikasi Indon
 45899        3247       1880      58  VNPT-AS-VN VNPT Corp, VN
  4766        2518      11120     602  KIXS-AS-KR Korea Telecom, KR
  9498        2216        474     231  BBIL-AP BHARTI Airtel Ltd., IN
 45090        2163       1438      79  TENCENT-NET-AP Shenzhen Tencent Compute
  4755        2122        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        6053      10131    2600  AMAZON-02, US
 11492        4573        303     813  CABLEONE, US
 22773        4028       3032     386  ASN-CXA-ALL-CCI-22773-RDC, US
  7155        3950        264      30  VIASAT-SP-BACKBONE, US
 16625        3679       1897    2568  AKAMAI-AS, US
  6327        3391       1319      65  SHAW, CA
   749        2890      50784    2146  DNIC-AS-00749, US
 30036        2603        374     146  MEDIACOM-ENTERPRISE-BUSINESS, US
   209        2522       5043     432  CENTURYLINK-US-LEGACY-QWEST, US
 20115        2241       3033     501  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        6839       1733     150  UNI2-AS, ES
  9121        6697       1692      17  TTNET, TR
 20940        3878       3348     210  AKAMAI-ASN1, NL
  8551        3566        378      39  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
 39891        3271        187      23  ALJAWWALSTC-AS, SA
 12389        2950       2284     902  ROSTELECOM-AS, RU
  9009        2546        261    1356  M247, GB
 34984        2216        357     601  TELLCOM-AS, TR
 47331        1952        313    1486  TTNET, TR
 58224        1774        923     577  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        8745       3452     578  Uninet S.A. de C.V., MX
 10620        3260        490     839  Telmex Colombia S.A., CO
 11830        2466        369      62  Instituto Costarricense de Electricidad
 13999        1637        283     461  Mega Cable, S.A. de C.V., MX
  6503        1440        355     522  Axtel, S.A.B. de C.V., MX
 28573        1400       2325     256  CLARO S.A., BR
  3816        1245        658     146  COLOMBIA TELECOMUNICACIONES S.A. ESP, C
 26615        1146       2350     138  TIM SA, BR
  6147        1089        369      21  Telefonica del Peru S.A.A., PE
 11664         994        191     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        1629        393      21  LINKdotNET-AS, EG
 24835        1548        499      32  RAYA-AS, EG
 36992        1299       1518     262  ETISALAT-MISR, EG
 36903        1195        543     114  MT-MPLS, MA
 29571         853         68      12  ORANGE-COTE-IVOIRE, CI
 36935         687        521      39  Vodafone-, EG
  6713         612       1863      34  IAM-AS, MA
 15399         517         50      33  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
  9808        8754       9000      57  CHINAMOBILE-CN China Mobile Communicati
  8151        8745       3452     578  Uninet S.A. de C.V., MX
 12479        6839       1733     150  UNI2-AS, ES
  9121        6697       1692      17  TTNET, TR
 16509        6053      10131    2600  AMAZON-02, US
  7545        5839        787     681  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4697       4192      74  ERX-CERNET-BKB China Education and Rese
 11492        4573        303     813  CABLEONE, US
 22773        4028       3032     386  ASN-CXA-ALL-CCI-22773-RDC, US
  7155        3950        264      30  VIASAT-SP-BACKBONE, US

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

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

   ASN  No of nets  Net Savings  Description
  8151        8745         8167  Uninet S.A. de C.V., MX
 12479        6839         6689  UNI2-AS, ES
  9121        6697         6680  TTNET, TR
  7545        5839         5158  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4697         4623  ERX-CERNET-BKB China Education and Research Net
  7155        3950         3920  VIASAT-SP-BACKBONE, US
 11492        4573         3760  CABLEONE, US
 20940        3878         3668  AKAMAI-ASN1, NL
 22773        4028         3642  ASN-CXA-ALL-CCI-22773-RDC, US
  7552        3608         3588  VIETEL-AS-AP Viettel Group, VN

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 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:      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      /11:102     /12:305     
/13:594     /14:1212    /15:2038    /16:13560   /17:8319    /18:13939   
/19:25253   /20:42953   /21:51755   /22:108112  /23:94471   /24:518607  
/25:795     /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        5876        6697  TTNET, TR
 12479        5785        6839  UNI2-AS, ES
 11492        3526        4573  CABLEONE, US
  6327        3199        3391  SHAW, CA
  8151        3169        8745  Uninet S.A. de C.V., MX
  7155        3040        3950  VIASAT-SP-BACKBONE, US
  8551        3031        3566  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
 22773        3004        4028  ASN-CXA-ALL-CCI-22773-RDC, US
 39891        2807        3271  ALJAWWALSTC-AS, SA
 30036        2258        2603  MEDIACOM-ENTERPRISE-BUSINESS, US

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

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

   1:1900      2:988       3:148       4:7         5:3696      6:102    
   7:5         8:1565      9:1        11:172      12:1702     13:409    
  14:2316     15:136      16:34       17:373      18:130      20:143    
  21:4        22:188      23:5381     24:2353     25:4        27:2572   
  29:19       31:2432     32:106      34:1        35:49       36:1729   
  37:3913     38:2439     39:712      40:148      41:3912     42:1049   
  43:2104     44:294      45:15972    46:3865     47:302      49:1628   
  50:1902     51:106      52:1348     54:290      55:733      56:4      
  57:56       58:1767     59:1139     60:947      61:2259     62:2422   
  63:1942     64:5401     65:2333     66:4930     67:2925     68:1184   
  69:4163     70:1337     71:677      72:3060     74:2622     75:1505   
  76:712      77:2154     78:3816     79:2781     80:1903     81:1651   
  82:1424     83:1196     84:1319     85:3563     86:693      87:1896   
  88:2619     89:3128     90:492      91:7535     92:1890     93:2576   
  94:3273     95:4517     96:1296     97:344      98:988      99:878    
 100:75      101:1050    102:1873    103:27849   104:4090    105:461    
 106:846     107:2415    108:748     109:4040    110:2051    111:3169   
 112:1944    113:1490    114:1531    115:1940    116:1880    117:2501   
 118:2305    119:1849    120:1627    121:1022    122:2528    123:2114   
 124:1610    125:2051    128:1378    129:1144    130:903     131:2071   
 132:752     133:365     134:1930    135:286     136:843     137:860    
 138:2457    139:1218    140:863     141:1310    142:1235    143:1422   
 144:1224    145:334     146:1751    147:1457    148:2206    149:1660   
 150:869     151:1081    152:1772    153:445     154:3616    155:1366   
 156:1850    157:1210    158:996     159:1999    160:2349    161:1276   
 162:3421    163:1191    164:1646    165:1527    166:619     167:1677   
 168:3672    169:685     170:4334    171:824     172:2920    173:3045   
 174:1004    175:1126    176:3448    177:4489    178:3015    179:1974   
 180:2290    181:2726    182:3208    183:1915    184:2412    185:19184  
 186:4257    187:3266    188:3785    189:2890    190:8815    191:1315   
 192:10985   193:8491    194:6943    195:4990    196:2889    197:2381   
 198:5992    199:5964    200:7450    201:5424    202:10466   203:10025  
 204:4510    205:3386    206:3851    207:3349    208:3997    209:4610   
 210:4228    211:2452    212:3921    213:3362    214:1154    215:64     
 216:6391    217:2637    218:1219    219:608     220:1962    221:982    
 222:844     223:2144   

End of report


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