[SANOG] Weekly Global IPv4 Routing Table Report

Routing Table Analysis Role Account cscora at apnic.net
Fri Jan 13 18:03:17 UTC 2023


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 14 Jan, 2023

  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:                              919061
    Prefixes after maximum aggregation (per Origin AS):          347675
    Deaggregation factor:                                          2.64
    Unique aggregates announced (without unneeded subnets):      445061
Total ASes present in the Internet Routing Table:                 74077
    Prefixes per ASN:                                             12.41
Origin-only ASes present in the Internet Routing Table:           63583
Origin ASes announcing only one prefix:                           26147
Transit ASes present in the Internet Routing Table:               10494
Transit-only ASes present in the Internet Routing Table:            429
Average AS path length visible in the Internet Routing Table:       4.2
    Max AS path length visible:                                      55
    Max AS path prepend of ASN (265020)                              50
Prefixes from unregistered ASNs in the Routing Table:               994
    Number of instances of unregistered ASNs:                      1003
Number of 32-bit ASNs allocated by the RIRs:                      41044
Number of 32-bit ASNs visible in the Routing Table:               34030
Prefixes from 32-bit ASNs in the Routing Table:                  166103
Number of bogon 32-bit ASNs visible in the Routing Table:            28
Special use prefixes present in the Routing Table:                    1
Prefixes being announced from unallocated address space:            506
Number of addresses announced to Internet:                   3064089600
    Equivalent to 182 /8s, 162 /16s and 76 /24s
    Percentage of available address space announced:               82.8
    Percentage of allocated address space announced:               82.8
    Percentage of available address space allocated:              100.0
    Percentage of address space in use by end-sites:               99.6
Total number of prefixes smaller than registry allocations:      312162

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

Prefixes being announced by APNIC Region ASes:                   240102
    Total APNIC prefixes after maximum aggregation:               68700
    APNIC Deaggregation factor:                                    3.49
Prefixes being announced from the APNIC address blocks:          235168
    Unique aggregates announced from the APNIC address blocks:    97635
APNIC Region origin ASes present in the Internet Routing Table:   13228
    APNIC Prefixes per ASN:                                       17.78
APNIC Region origin ASes announcing only one prefix:               3846
APNIC Region transit ASes present in the Internet Routing Table:   1771
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:   8486
Number of APNIC addresses announced to Internet:              773797504
    Equivalent to 46 /8s, 31 /16s and 54 /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:                    267585
    Total ARIN prefixes after maximum aggregation:               121726
    ARIN Deaggregation factor:                                     2.20
Prefixes being announced from the ARIN address blocks:           269035
    Unique aggregates announced from the ARIN address blocks:    129786
ARIN Region origin ASes present in the Internet Routing Table:    19078
    ARIN Prefixes per ASN:                                        14.10
ARIN Region origin ASes announcing only one prefix:                6985
ARIN Region transit ASes present in the Internet Routing Table:    1958
Average ARIN Region AS path length visible:                         3.7
    Max ARIN Region AS path length visible:                          37
Number of ARIN region 32-bit ASNs visible in the Routing Table:    4730
Number of ARIN addresses announced to Internet:              1286418688
    Equivalent to 76 /8s, 173 /16s and 49 /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:                    264097
    Total RIPE prefixes after maximum aggregation:               122331
    RIPE Deaggregation factor:                                     2.16
Prefixes being announced from the RIPE address blocks:           260772
    Unique aggregates announced from the RIPE address blocks:    156173
RIPE Region origin ASes present in the Internet Routing Table:    28235
    RIPE Prefixes per ASN:                                         9.24
RIPE Region origin ASes announcing only one prefix:               12065
RIPE Region transit ASes present in the Internet Routing Table:    3970
Average RIPE Region AS path length visible:                         4.2
    Max RIPE Region AS path length visible:                          34
Number of RIPE region 32-bit ASNs visible in the Routing Table:   10989
Number of RIPE addresses announced to Internet:               719307136
    Equivalent to 42 /8s, 223 /16s and 193 /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:                  117520
    Total LACNIC prefixes after maximum aggregation:              28456
    LACNIC Deaggregation factor:                                   4.13
Prefixes being announced from the LACNIC address blocks:         116752
    Unique aggregates announced from the LACNIC address blocks:   48964
LACNIC Region origin ASes present in the Internet Routing Table:  11006
    LACNIC Prefixes per ASN:                                      10.61
LACNIC Region origin ASes announcing only one prefix:              2660
LACNIC Region transit ASes present in the Internet Routing Table:  2277
Average LACNIC Region AS path length visible:                       4.9
    Max LACNIC Region AS path length visible:                        55
Number of LACNIC region 32-bit ASNs visible in the Routing Table:  8775
Number of LACNIC addresses announced to Internet:             176079360
    Equivalent to 10 /8s, 126 /16s and 194 /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:                  28763
    Total AfriNIC prefixes after maximum aggregation:              5705
    AfriNIC Deaggregation factor:                                  5.04
Prefixes being announced from the AfriNIC address blocks:         36828
    Unique aggregates announced from the AfriNIC address blocks:  12091
AfriNIC Region origin ASes present in the Internet Routing Table:  1708
    AfriNIC Prefixes per ASN:                                     21.56
AfriNIC Region origin ASes announcing only one prefix:              591
AfriNIC Region transit ASes present in the Internet Routing Table:  324
Average AfriNIC Region AS path length visible:                      4.9
    Max AfriNIC Region AS path length visible:                       30
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 1050
Number of AfriNIC addresses announced to Internet:            108193280
    Equivalent to 6 /8s, 114 /16s and 230 /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        9358       8884      50  CHINAMOBILE-CN China Mobile Communicati
  7545        5940        786     699  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4861       4192      75  ERX-CERNET-BKB China Education and Rese
  7552        3626       1331      21  VIETEL-AS-AP Viettel Group, VN
  7713        3507       1043      63  TELKOMNET-AS-AP PT Telekomunikasi Indon
 45899        3381       1874      96  VNPT-AS-VN VNPT Corp, VN
  9498        2697        499     237  BBIL-AP BHARTI Airtel Ltd., IN
  4766        2508      11250     592  KIXS-AS-KR Korea Telecom, KR
 24560        2360        849     436  AIRTELBROADBAND-AS-AP Bharti Airtel Ltd
 45090        2180       1438      79  TENCENT-NET-AP Shenzhen Tencent Compute

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        7739      10695    2936  AMAZON-02, US
 11492        4548        301     578  CABLEONE, US
  7155        3895        265      33  VIASAT-SP-BACKBONE, US
 22773        3690       3062     320  ASN-CXA-ALL-CCI-22773-RDC, US
  6327        3523       1320      63  SHAW, CA
 16625        3467       1791    2516  AKAMAI-AS, US
   749        3023      50575    2290  DNIC-AS-00749, US
  7018        2621      24133    1589  ATT-INTERNET4, US
396982        2577       3493     370  GOOGLE-CLOUD-PLATFORM, US
 30036        2569        368     361  MEDIACOM-ENTERPRISE-BUSINESS, 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        6965       1706     146  UNI2-AS, ES
  9121        6111       1692      17  TTNET, TR
 39891        4556        268      59  ALJAWWALSTC-AS, SA
 20940        4060       3400     181  AKAMAI-ASN1, NL
  8551        3908        374      38  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
 12389        2941       2290     908  ROSTELECOM-AS, RU
 47331        2802        411    2109  TTNET, TR
  9009        2656        253    1364  M247, RO
 34984        2254        358     610  TELLCOM-AS, TR
  6849        2194        339      20  UKRTELNET, UA

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

LACNIC Region per AS prefix count summary
-----------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
  8151       10924       3337     589  Uninet S.A. de C.V., MX
 10620        3469        507     852  Telmex Colombia S.A., CO
 11830        2261        369      64  Instituto Costarricense de Electricidad
 13999        2208        362     594  Mega Cable, S.A. de C.V., MX
 28573        1345       2328     258  Claro NXT Telecomunicacoes Ltda, BR
  6503        1295        339     517  Axtel, S.A.B. de C.V., MX
  3816        1291        740     156  COLOMBIA TELECOMUNICACIONES S.A. ESP, C
  6147        1151        370      22  Telefonica del Peru S.A.A., PE
 11664        1136        186     465  Techtel LMDS Comunicaciones Interactiva
 26615        1006       2466      43  TIM SA, BR

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
 24835        1538        533      30  RAYA-AS, EG
 24863        1477        393      21  LINKdotNET-AS, EG
 36992        1327       1517     275  ETISALAT-MISR, EG
 36903        1242        550      99  MT-MPLS, MA
 29571        1005         67      46  ORANGE-COTE-IVOIRE, CI
 36935         884        520      42  Vodafone-, EG
  6713         611       1861      34  IAM-AS, MA
 15399         517         53      42  WANANCHI-, KE
 37342         494         32       1  MOVITEL, MZ
 24757         493         73       5  EthioNet-AS, ET

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       10924       3337     589  Uninet S.A. de C.V., MX
  9808        9358       8884      50  CHINAMOBILE-CN China Mobile Communicati
 16509        7739      10695    2936  AMAZON-02, US
 12479        6965       1706     146  UNI2-AS, ES
  9121        6111       1692      17  TTNET, TR
  7545        5940        786     699  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4861       4192      75  ERX-CERNET-BKB China Education and Rese
 39891        4556        268      59  ALJAWWALSTC-AS, SA
 11492        4548        301     578  CABLEONE, US
 20940        4060       3400     181  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        9358         9308  CHINAMOBILE-CN China Mobile Communications Grou
 12479        6965         6819  UNI2-AS, ES
  9121        6111         6094  TTNET, TR
  7545        5940         5241  TPG-INTERNET-AP TPG Telecom Limited, AU
 16509        7739         4803  AMAZON-02, US
  4538        4861         4786  ERX-CERNET-BKB China Education and Research Net
 39891        4556         4497  ALJAWWALSTC-AS, SA
 11492        4548         3970  CABLEONE, US
 20940        4060         3879  AKAMAI-ASN1, NL
  8551        3908         3870  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
    398083  UNALLOCATED  5.133.124.0/24          399587  UT, US
      3402  UNALLOCATED  8.2.200.0/21              6939  HURRICANE, US
      3402  UNALLOCATED  8.2.207.0/24              2914  NTT-LTD-2914, US
     33123  UNALLOCATED  8.10.69.0/24             11168  SCC, US
     16641  UNALLOCATED  8.10.194.0/24             3356  LEVEL3, US
     16641  UNALLOCATED  8.10.210.0/24             3356  LEVEL3, US
     25674  UNALLOCATED  8.12.76.0/24              3356  LEVEL3, US
     16641  UNALLOCATED  8.12.250.0/24             3356  LEVEL3, US
     25674  UNALLOCATED  8.14.115.0/24             3356  LEVEL3, US
     12169  UNALLOCATED  8.15.207.0/24            32787  PROLEXIC-TECHNOLOGIES-DDOS-M

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
23.131.185.0/24      Origin:       174  COGENT-174, US
23.131.185.0/24     Transit:      2516  KDDI KDDI CORPORATION, JP
23.131.186.0/24      Origin:       174  COGENT-174, US
23.131.186.0/24     Transit:      2516  KDDI KDDI CORPORATION, JP
23.131.187.0/24      Origin:       174  COGENT-174, US
23.131.187.0/24     Transit:      2516  KDDI KDDI CORPORATION, JP
23.131.188.0/24      Origin:       174  COGENT-174, US
23.131.188.0/24     Transit:      2516  KDDI KDDI CORPORATION, JP
23.136.112.0/24      Origin:     54835  UNASSIGNED
23.136.112.0/24     Transit:     21559  OSNET, PR

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      /10:39      /11:101     /12:295     
/13:582     /14:1200    /15:2039    /16:13497   /17:8317    /18:13928   
/19:25206   /20:44302   /21:52313   /22:110293  /23:98297   /24:547814  
/25:809     /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        6025        6965  UNI2-AS, ES
  9121        5290        6111  TTNET, TR
  8151        4973       10924  Uninet S.A. de C.V., MX
 39891        3547        4556  ALJAWWALSTC-AS, SA
 11492        3455        4548  CABLEONE, US
  8551        3373        3908  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
  6327        3331        3523  SHAW, CA
  7155        2984        3895  VIASAT-SP-BACKBONE, US
 22773        2724        3690  ASN-CXA-ALL-CCI-22773-RDC, US
 47331        2423        2802  TTNET, TR

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

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

   1:1640      2:1243      3:168       4:5         5:4116      6:109    
   7:5         8:1572      9:1        11:172      12:1595     13:370    
  14:2368     15:285      16:79       17:370      18:412      20:243    
  21:4        22:188      23:6049     24:2467     25:4        27:2646   
  29:19       31:2500     32:99       34:8        35:100      36:1862   
  37:4605     38:4005     39:831      40:155      41:3951     42:1051   
  43:2316     44:303      45:16420    46:4182     47:381      49:1743   
  50:1917     51:378      52:1543     54:393      55:863      56:8      
  57:77       58:1744     59:1158     60:1006     61:2421     62:2633   
  63:1941     64:5658     65:2328     66:4903     67:3054     68:1343   
  69:4120     70:1256     71:657      72:2980     74:2592     75:1465   
  76:597      77:2373     78:3955     79:3161     80:2062     81:1825   
  82:1480     83:1229     84:1514     85:3745     86:747      87:1929   
  88:2876     89:3563     90:591      91:7643     92:1983     93:2574   
  94:3519     95:4864     96:1307     97:346      98:1166     99:738    
 100:75      101:1061    102:2521    103:30793   104:4591    105:484    
 106:843     107:2538    108:916     109:4376    110:2046    111:3304   
 112:2045    113:1554    114:1611    115:2043    116:1904    117:2537   
 118:2293    119:1898    120:1767    121:1113    122:2586    123:2158   
 124:1600    125:2346    128:1306    129:1062    130:972     131:2014   
 132:800     133:405     134:1902    135:298     136:886     137:921    
 138:2579    139:1541    140:1025    141:1478    142:1425    143:1420   
 144:1184    145:350     146:1900    147:1549    148:2296    149:1875   
 150:863     151:1132    152:1857    153:478     154:3897    155:1405   
 156:1649    157:1300    158:1048    159:2267    160:2560    161:1423   
 162:3536    163:1489    164:1688    165:1655    166:831     167:1737   
 168:3870    169:921     170:4586    171:886     172:3491    173:3011   
 174:1026    175:1149    176:3721    177:4743    178:3556    179:2146   
 180:2379    181:3366    182:3276    183:1929    184:2345    185:19970  
 186:4654    187:3930    188:4100    189:3451    190:9065    191:1425   
 192:10955   193:8858    194:7233    195:5116    196:3006    197:2412   
 198:5994    199:6098    200:7724    201:5887    202:10647   203:10037  
 204:4609    205:3500    206:3860    207:3416    208:4091    209:4821   
 210:4437    211:2498    212:4111    213:3569    214:1101    215:55     
 216:6585    217:2638    218:1279    219:577     220:2019    221:969    
 222:845     223:1998   

End of report


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