[SANOG] Weekly Global IPv4 Routing Table Report

Routing Table Analysis Role Account cscora at apnic.net
Fri May 20 18:02:48 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 21 May, 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:                              898401
    Prefixes after maximum aggregation (per Origin AS):          338496
    Deaggregation factor:                                          2.65
    Unique aggregates announced (without unneeded subnets):      432821
Total ASes present in the Internet Routing Table:                 73208
    Prefixes per ASN:                                             12.27
Origin-only ASes present in the Internet Routing Table:           62857
Origin ASes announcing only one prefix:                           25798
Transit ASes present in the Internet Routing Table:               10351
Transit-only ASes present in the Internet Routing Table:            379
Average AS path length visible in the Internet Routing Table:       4.4
    Max AS path length visible:                                      66
    Max AS path prepend of ASN (267602)                              58
Prefixes from unregistered ASNs in the Routing Table:               920
    Number of instances of unregistered ASNs:                       925
Number of 32-bit ASNs allocated by the RIRs:                      39435
Number of 32-bit ASNs visible in the Routing Table:               32698
Prefixes from 32-bit ASNs in the Routing Table:                  154112
Number of bogon 32-bit ASNs visible in the Routing Table:           234
Special use prefixes present in the Routing Table:                    1
Prefixes being announced from unallocated address space:            550
Number of addresses announced to Internet:                   3065123456
    Equivalent to 182 /8s, 178 /16s and 18 /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:      305118

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

Prefixes being announced by APNIC Region ASes:                   235350
    Total APNIC prefixes after maximum aggregation:               66814
    APNIC Deaggregation factor:                                    3.52
Prefixes being announced from the APNIC address blocks:          230530
    Unique aggregates announced from the APNIC address blocks:    94912
APNIC Region origin ASes present in the Internet Routing Table:   12666
    APNIC Prefixes per ASN:                                       18.20
APNIC Region origin ASes announcing only one prefix:               3622
APNIC Region transit ASes present in the Internet Routing Table:   1747
Average APNIC Region AS path length visible:                        4.7
    Max APNIC Region AS path length visible:                         32
Number of APNIC region 32-bit ASNs visible in the Routing Table:   7862
Number of APNIC addresses announced to Internet:              774272768
    Equivalent to 46 /8s, 38 /16s and 119 /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:                    261942
    Total ARIN prefixes after maximum aggregation:               120183
    ARIN Deaggregation factor:                                     2.18
Prefixes being announced from the ARIN address blocks:           261791
    Unique aggregates announced from the ARIN address blocks:    126089
ARIN Region origin ASes present in the Internet Routing Table:    19046
    ARIN Prefixes per ASN:                                        13.75
ARIN Region origin ASes announcing only one prefix:                6916
ARIN Region transit ASes present in the Internet Routing Table:    1938
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:    4503
Number of ARIN addresses announced to Internet:              1292504064
    Equivalent to 77 /8s, 10 /16s and 12 /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:                    257788
    Total RIPE prefixes after maximum aggregation:               117753
    RIPE Deaggregation factor:                                     2.19
Prefixes being announced from the RIPE address blocks:           255188
    Unique aggregates announced from the RIPE address blocks:    151009
RIPE Region origin ASes present in the Internet Routing Table:    28148
    RIPE Prefixes per ASN:                                         9.07
RIPE Region origin ASes announcing only one prefix:               12033
RIPE Region transit ASes present in the Internet Routing Table:    3967
Average RIPE Region AS path length visible:                         4.3
    Max RIPE Region AS path length visible:                          40
Number of RIPE region 32-bit ASNs visible in the Routing Table:   10708
Number of RIPE addresses announced to Internet:               713994624
    Equivalent to 42 /8s, 142 /16s and 177 /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:                  114731
    Total LACNIC prefixes after maximum aggregation:              27608
    LACNIC Deaggregation factor:                                   4.16
Prefixes being announced from the LACNIC address blocks:         114561
    Unique aggregates announced from the LACNIC address blocks:   48615
LACNIC Region origin ASes present in the Internet Routing Table:  10950
    LACNIC Prefixes per ASN:                                      10.46
LACNIC Region origin ASes announcing only one prefix:              2666
LACNIC Region transit ASes present in the Internet Routing Table:  2195
Average LACNIC Region AS path length visible:                       4.9
    Max LACNIC Region AS path length visible:                        66
Number of LACNIC region 32-bit ASNs visible in the Routing Table:  8664
Number of LACNIC addresses announced to Internet:             176484608
    Equivalent to 10 /8s, 132 /16s and 241 /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:                  27670
    Total AfriNIC prefixes after maximum aggregation:              5449
    AfriNIC Deaggregation factor:                                  5.08
Prefixes being announced from the AfriNIC address blocks:         35781
    Unique aggregates announced from the AfriNIC address blocks:  11747
AfriNIC Region origin ASes present in the Internet Routing Table:  1632
    AfriNIC Prefixes per ASN:                                     21.92
AfriNIC Region origin ASes announcing only one prefix:              561
AfriNIC Region transit ASes present in the Internet Routing Table:  326
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:  961
Number of AfriNIC addresses announced to Internet:            107563520
    Equivalent to 6 /8s, 105 /16s and 74 /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        9166       8884      43  CHINAMOBILE-CN China Mobile Communicati
  7545        5898        789     695  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4709       4192      75  ERX-CERNET-BKB China Education and Rese
  7552        3591       1330      19  VIETEL-AS-AP Viettel Group, VN
  7713        3491       1039      53  TELKOMNET-AS-AP PT Telekomunikasi Indon
 45899        3426       1880      56  VNPT-AS-VN VNPT Corp, VN
  4766        2494      11121     601  KIXS-AS-KR Korea Telecom, KR
  9498        2408        499     237  BBIL-AP BHARTI Airtel Ltd., IN
 45090        2169       1438      79  TENCENT-NET-AP Shenzhen Tencent Compute
  4755        2120        438     204  TATACOMM-AS TATA Communications formerl

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

ARIN Region per AS prefix count summary
---------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
 16509        6414      10351    2772  AMAZON-02, US
 11492        4510        299     660  CABLEONE, US
 22773        3913       3067     353  ASN-CXA-ALL-CCI-22773-RDC, US
  7155        3901        264      31  VIASAT-SP-BACKBONE, US
 16625        3539       1821    2534  AKAMAI-AS, US
  6327        3438       1318      62  SHAW, CA
   749        2881      50795    2138  DNIC-AS-00749, US
 30036        2634        374     120  MEDIACOM-ENTERPRISE-BUSINESS, US
   209        2466       4961     421  CENTURYLINK-US-LEGACY-QWEST, US
 20115        2250       3050     492  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        6799       1730     150  UNI2-AS, ES
  9121        6720       1692      17  TTNET, TR
  8551        3996        374      39  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
 20940        3973       3360     201  AKAMAI-ASN1, NL
 39891        3819        220      34  ALJAWWALSTC-AS, SA
 12389        2949       2273     908  ROSTELECOM-AS, RU
  6849        2927        355      21  UKRTELNET, UA
  9009        2489        249    1295  M247, GB
 34984        2242        357     627  TELLCOM-AS, TR
 47331        2087        328    1598  TTNET, TR

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       10596       3396     568  Uninet S.A. de C.V., MX
 10620        3472        518     743  Telmex Colombia S.A., CO
 11830        2437        369      63  Instituto Costarricense de Electricidad
 13999        1823        300     468  Mega Cable, S.A. de C.V., MX
  6503        1447        355     527  Axtel, S.A.B. de C.V., MX
 28573        1382       2333     255  CLARO S.A., BR
  3816        1257        671     148  COLOMBIA TELECOMUNICACIONES S.A. ESP, C
  6147        1079        369      21  Telefonica del Peru S.A.A., PE
 11664        1022        192     445  Techtel LMDS Comunicaciones Interactiva
 11172         958        133      61  Alestra, S. de R.L. de C.V., MX

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        1653        393      21  LINKdotNET-AS, EG
 24835        1441        497      29  RAYA-AS, EG
 36992        1313       1519     263  ETISALAT-MISR, EG
 36903        1199        545     114  MT-MPLS, MA
 29571         947         65      57  ORANGE-COTE-IVOIRE, CI
 36935         619        520      42  Vodafone-, EG
  6713         611       1863      34  IAM-AS, MA
 15399         516         51      36  WANANCHI-, KE
 37342         465         32       1  MOVITEL, MZ
 23889         423        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       10596       3396     568  Uninet S.A. de C.V., MX
  9808        9166       8884      43  CHINAMOBILE-CN China Mobile Communicati
 12479        6799       1730     150  UNI2-AS, ES
  9121        6720       1692      17  TTNET, TR
 16509        6414      10351    2772  AMAZON-02, US
  7545        5898        789     695  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4709       4192      75  ERX-CERNET-BKB China Education and Rese
 11492        4510        299     660  CABLEONE, US
  8551        3996        374      39  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
 20940        3973       3360     201  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        9166         9123  CHINAMOBILE-CN China Mobile Communications Grou
  9121        6720         6703  TTNET, TR
 12479        6799         6649  UNI2-AS, ES
  7545        5898         5203  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4709         4634  ERX-CERNET-BKB China Education and Research Net
  8551        3996         3957  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
  7155        3901         3870  VIASAT-SP-BACKBONE, US
 11492        4510         3850  CABLEONE, US
 39891        3819         3785  ALJAWWALSTC-AS, SA
 20940        3973         3772  AKAMAI-ASN1, NL

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
     65454  PRIVATE      1.9.206.0/24              4788  TMNET-AS-AP TM Net, Internet
    398083  UNALLOCATED  5.133.124.0/24          399587  UT, US
     33123  UNALLOCATED  8.10.69.0/24             11168  SCC, 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

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
23.129.40.0/24       Origin:      6461  ZAYO-6461, US
23.129.40.0/24      Transit:      2516  KDDI KDDI CORPORATION, JP
23.129.56.0/24       Origin:      6461  ZAYO-6461, US
23.129.56.0/24      Transit:      2516  KDDI KDDI CORPORATION, JP
23.129.136.0/24      Origin:      6461  ZAYO-6461, US
23.129.136.0/24     Transit:      2516  KDDI KDDI CORPORATION, JP
23.131.8.0/24        Origin:      3257  GTT-BACKBONE GTT, US
23.131.8.0/24       Transit:      2516  KDDI KDDI CORPORATION, JP
23.131.88.0/24       Origin:      3257  GTT-BACKBONE GTT, US
23.131.88.0/24      Transit:      2516  KDDI KDDI CORPORATION, JP

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      /11:100     /12:303     
/13:590     /14:1210    /15:2059    /16:13526   /17:8287    /18:13889   
/19:25188   /20:43913   /21:52216   /22:108436  /23:96172   /24:531636  
/25:806     /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        6720  TTNET, TR
 12479        5775        6799  UNI2-AS, ES
  8151        4323       10596  Uninet S.A. de C.V., MX
  8551        3462        3996  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
 11492        3415        4510  CABLEONE, US
  6327        3250        3438  SHAW, CA
 39891        3131        3819  ALJAWWALSTC-AS, SA
  7155        2991        3901  VIASAT-SP-BACKBONE, US
 22773        2918        3913  ASN-CXA-ALL-CCI-22773-RDC, US
  6849        2778        2927  UKRTELNET, UA

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

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

   1:1937      2:1021      3:154       4:6         5:3789      6:104    
   7:5         8:1566      9:1        11:173      12:1711     13:296    
  14:2382     15:201      16:41       17:384      18:161      20:212    
  21:4        22:188      23:5668     24:2315     25:6        27:2602   
  29:19       31:2424     32:95       34:4        35:78       36:1757   
  37:4424     38:2882     39:698      40:152      41:3966     42:1092   
  43:2175     44:291      45:16047    46:4139     47:322      49:1701   
  50:2158     51:108      52:1427     54:369      55:747      56:8      
  57:59       58:1812     59:1213     60:948      61:2259     62:2513   
  63:1946     64:5524     65:2313     66:4865     67:2975     68:1193   
  69:4172     70:1330     71:685      72:3052     74:2651     75:1392   
  76:579      77:2164     78:3914     79:3112     80:1989     81:1742   
  82:1494     83:1209     84:1357     85:3666     86:709      87:1959   
  88:2744     89:3280     90:531      91:7639     92:2017     93:2590   
  94:3488     95:4773     96:1309     97:349      98:993      99:736    
 100:76      101:1044    102:2050    103:29071   104:4387    105:463    
 106:874     107:2517    108:832     109:4258    110:2032    111:3287   
 112:2031    113:1553    114:1487    115:1976    116:1915    117:2510   
 118:2330    119:1839    120:1696    121:1076    122:2580    123:2120   
 124:1586    125:2127    128:1231    129:1104    130:976     131:2063   
 132:769     133:378     134:1900    135:290     136:880     137:862    
 138:2443    139:1504    140:861     141:1403    142:1288    143:1441   
 144:1201    145:346     146:1811    147:1491    148:2217    149:1729   
 150:851     151:1081    152:1849    153:459     154:3472    155:1418   
 156:1839    157:1234    158:1045    159:2168    160:2514    161:1275   
 162:3462    163:1273    164:1650    165:1605    166:721     167:1708   
 168:3781    169:840     170:4489    171:828     172:3175    173:3144   
 174:1021    175:1129    176:3589    177:4649    178:3545    179:2034   
 180:2284    181:3008    182:3250    183:1954    184:2375    185:19492  
 186:4295    187:3748    188:3882    189:3272    190:8860    191:1307   
 192:10993   193:8616    194:7000    195:4978    196:2954    197:2375   
 198:5999    199:6035    200:7496    201:5726    202:10490   203:10033  
 204:4546    205:3450    206:3764    207:3381    208:4019    209:4652   
 210:4324    211:2458    212:4056    213:3444    214:1149    215:67     
 216:6474    217:2668    218:1267    219:571     220:1940    221:979    
 222:843     223:2154   

End of report


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