[SANOG] Weekly Global IPv4 Routing Table Report

Routing Table Analysis Role Account cscora at apnic.net
Fri Sep 1 18:02:09 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
UKNOF, 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 02 Sep, 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:                              927029
    Prefixes after maximum aggregation (per Origin AS):          352283
    Deaggregation factor:                                          2.63
    Unique aggregates announced (without unneeded subnets):      452648
Total ASes present in the Internet Routing Table:                 74745
    Prefixes per ASN:                                             12.40
Origin-only ASes present in the Internet Routing Table:           64206
Origin ASes announcing only one prefix:                           26346
Transit ASes present in the Internet Routing Table:               10539
Transit-only ASes present in the Internet Routing Table:            456
Average AS path length visible in the Internet Routing Table:       4.2
    Max AS path length visible:                                     132
    Max AS path prepend of ASN ( 37447)                             129
Prefixes from unregistered ASNs in the Routing Table:              1011
    Number of instances of unregistered ASNs:                      1013
Number of 32-bit ASNs allocated by the RIRs:                      42560
Number of 32-bit ASNs visible in the Routing Table:               35031
Prefixes from 32-bit ASNs in the Routing Table:                  174588
Number of bogon 32-bit ASNs visible in the Routing Table:            42
Special use prefixes present in the Routing Table:                    1
Prefixes being announced from unallocated address space:            546
Number of addresses announced to Internet:                   3056681728
    Equivalent to 182 /8s, 49 /16s and 67 /24s
    Percentage of available address space announced:               82.6
    Percentage of allocated address space announced:               82.6
    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:      308479

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

Prefixes being announced by APNIC Region ASes:                   246230
    Total APNIC prefixes after maximum aggregation:               70545
    APNIC Deaggregation factor:                                    3.49
Prefixes being announced from the APNIC address blocks:          239962
    Unique aggregates announced from the APNIC address blocks:    98716
APNIC Region origin ASes present in the Internet Routing Table:   13608
    APNIC Prefixes per ASN:                                       17.63
APNIC Region origin ASes announcing only one prefix:               4036
APNIC Region transit ASes present in the Internet Routing Table:   1798
Average APNIC Region AS path length visible:                        4.4
    Max APNIC Region AS path length visible:                         24
Number of APNIC region 32-bit ASNs visible in the Routing Table:   8936
Number of APNIC addresses announced to Internet:              772978304
    Equivalent to 46 /8s, 18 /16s and 182 /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, 131072-153913
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:                    272068
    Total ARIN prefixes after maximum aggregation:               123862
    ARIN Deaggregation factor:                                     2.20
Prefixes being announced from the ARIN address blocks:           274437
    Unique aggregates announced from the ARIN address blocks:    131388
ARIN Region origin ASes present in the Internet Routing Table:    19097
    ARIN Prefixes per ASN:                                        14.37
ARIN Region origin ASes announcing only one prefix:                6956
ARIN Region transit ASes present in the Internet Routing Table:    1957
Average ARIN Region AS path length visible:                         3.7
    Max ARIN Region AS path length visible:                          24
Number of ARIN region 32-bit ASNs visible in the Routing Table:    4826
Number of ARIN addresses announced to Internet:              1280142336
    Equivalent to 76 /8s, 77 /16s and 108 /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:                    259870
    Total RIPE prefixes after maximum aggregation:               122697
    RIPE Deaggregation factor:                                     2.12
Prefixes being announced from the RIPE address blocks:           256375
    Unique aggregates announced from the RIPE address blocks:    159997
RIPE Region origin ASes present in the Internet Routing Table:    28383
    RIPE Prefixes per ASN:                                         9.03
RIPE Region origin ASes announcing only one prefix:               12032
RIPE Region transit ASes present in the Internet Routing Table:    3929
Average RIPE Region AS path length visible:                         4.3
    Max RIPE Region AS path length visible:                          34
Number of RIPE region 32-bit ASNs visible in the Routing Table:   11305
Number of RIPE addresses announced to Internet:               716752256
    Equivalent to 42 /8s, 184 /16s and 197 /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
                       196608-216475
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:                  118155
    Total LACNIC prefixes after maximum aggregation:              28527
    LACNIC Deaggregation factor:                                   4.14
Prefixes being announced from the LACNIC address blocks:         117183
    Unique aggregates announced from the LACNIC address blocks:   49270
LACNIC Region origin ASes present in the Internet Routing Table:  11024
    LACNIC Prefixes per ASN:                                      10.63
LACNIC Region origin ASes announcing only one prefix:              2701
LACNIC Region transit ASes present in the Internet Routing Table:  2316
Average LACNIC Region AS path length visible:                       4.9
    Max LACNIC Region AS path length visible:                        70
Number of LACNIC region 32-bit ASNs visible in the Routing Table:  8838
Number of LACNIC addresses announced to Internet:             178604032
    Equivalent to 10 /8s, 165 /16s and 72 /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:                  29695
    Total AfriNIC prefixes after maximum aggregation:              5954
    AfriNIC Deaggregation factor:                                  4.99
Prefixes being announced from the AfriNIC address blocks:         38526
    Unique aggregates announced from the AfriNIC address blocks:  12822
AfriNIC Region origin ASes present in the Internet Routing Table:  1785
    AfriNIC Prefixes per ASN:                                     21.58
AfriNIC Region origin ASes announcing only one prefix:              621
AfriNIC Region transit ASes present in the Internet Routing Table:  332
Average AfriNIC Region AS path length visible:                      4.9
    Max AfriNIC Region AS path length visible:                      132
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 1126
Number of AfriNIC addresses announced to Internet:            107749888
    Equivalent to 6 /8s, 108 /16s and 34 /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        9498       8729      40  CHINAMOBILE-CN China Mobile Communicati
  7545        5726        784     688  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4867       4192      75  ERX-CERNET-BKB China Education and Rese
 18403        4330        347      25  FPT-AS-AP FPT Telecom Company, VN
  7713        3596       1043      63  TELKOMNET-AS-AP PT Telekomunikasi Indon
 45899        3339       1840      97  VNPT-AS-VN VNPT Corp, VN
  9498        3116        498     251  BBIL-AP BHARTI Airtel Ltd., IN
  7552        2935       1330      20  VIETEL-AS-AP Viettel Group, VN
  4766        2559      11271     594  KIXS-AS-KR Korea Telecom, KR
 24560        2490        847     397  AIRTELBROADBAND-AS-AP Bharti Airtel Ltd

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        9016      10983    3266  AMAZON-02, US
 11492        4523        300     648  CABLEONE, US
  7155        4179        288     101  VIASAT-SP-BACKBONE, US
 22773        3559       3056     314  ASN-CXA-ALL-CCI-22773-RDC, US
  6327        3535       1319      66  SHAW, CA
   749        3146      54960    2398  DNIC-AS-00749, US
 16625        3042       1467    2297  AKAMAI-AS, US
   367        2966       3835    1395  DNIC-ASBLK-00306-00371, US
396982        2688       3596     387  GOOGLE-CLOUD-PLATFORM, US
 30036        2498        358     376  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        7346       1713     145  UNI2-AS, ES
 39891        4897        290      61  ALJAWWALSTC-AS, SA
 20940        4090       3398     153  AKAMAI-ASN1, NL
  8551        3459        368      34  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
 12389        2983       2296     916  ROSTELECOM-AS, RU
  9009        2674        247    1381  M247, RO
 34984        2328        362     596  TELLCOM-AS, TR
 58224        1749        933     521  TCI, IR
 13188        1606        100      27  TRIOLAN, UA
 61317        1510        101    1176  ASDETUK www.heficed.com, US

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       11521       3362     597  UNINET, MX
 10620        3537        506     849  Telmex Colombia S.A., CO
 13999        2453        364     642  Mega Cable, S.A. de C.V., MX
 11830        1996        369      64  Instituto Costarricense de Electricidad
 28573        1317       2324     232  Claro NXT Telecomunicacoes Ltda, BR
  6503        1302        344     510  Axtel, S.A.B. de C.V., MX
  3816        1294        764     196  COLOMBIA TELECOMUNICACIONES S.A. ESP, C
 11664        1121        182     434  Techtel LMDS Comunicaciones Interactiva
  6147        1113        370      22  Telefonica del Peru S.A.A., PE
 26615        1015       2501      49  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
 24863        1593        393      19  LINKdotNET-AS, EG
 24835        1457        497      26  RAYA-AS, EG
 36992        1356       1518     281  ETISALAT-MISR, EG
 36903        1242        550      99  MT-MPLS, MA
 29571        1047         67      45  ORANGE-COTE-IVOIRE, CI
 36935         781        520      36  Vodafone-, EG
  6713         551       1861      34  IAM-AS, MA
 15399         533         55      51  WANANCHI-, KE
 37342         465         32       1  MOVITEL, MZ
 24757         458         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       11521       3362     597  UNINET, MX
  9808        9498       8729      40  CHINAMOBILE-CN China Mobile Communicati
 16509        9016      10983    3266  AMAZON-02, US
 12479        7346       1713     145  UNI2-AS, ES
  7545        5726        784     688  TPG-INTERNET-AP TPG Telecom Limited, AU
 39891        4897        290      61  ALJAWWALSTC-AS, SA
  4538        4867       4192      75  ERX-CERNET-BKB China Education and Rese
 11492        4523        300     648  CABLEONE, US
 18403        4330        347      25  FPT-AS-AP FPT Telecom Company, VN
  7155        4179        288     101  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
  9808        9498         9458  CHINAMOBILE-CN China Mobile Communications Grou
 12479        7346         7201  UNI2-AS, ES
 16509        9016         5750  AMAZON-02, US
  7545        5726         5038  TPG-INTERNET-AP TPG Telecom Limited, AU
 39891        4897         4836  ALJAWWALSTC-AS, SA
  4538        4867         4792  ERX-CERNET-BKB China Education and Research Net
 18403        4330         4305  FPT-AS-AP FPT Telecom Company, VN
  7155        4179         4078  VIASAT-SP-BACKBONE, US
 20940        4090         3937  AKAMAI-ASN1, NL
 11492        4523         3875  CABLEONE, 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
     33492  UNALLOCATED  8.6.184.0/23             33650  COMCAST-33650, US
     33123  UNALLOCATED  8.10.69.0/24             11168  SCC, US
     12169  UNALLOCATED  8.15.207.0/24            32787  PROLEXIC-TECHNOLOGIES-DDOS-M
     40493  UNALLOCATED  8.17.26.0/24              3356  LEVEL3, US
     53775  UNALLOCATED  8.20.88.0/24              7029  WINDSTREAM, US
     62828  UNALLOCATED  8.21.130.0/24             3356  LEVEL3, US
    393266  UNALLOCATED  8.23.52.0/24             46887  LIGHTOWER, US
    396894  UNALLOCATED  8.28.201.0/24            46887  LIGHTOWER, US
    394936  UNALLOCATED  8.33.224.0/24            22442  HOU-PHONOSCOPE, US
     54338  UNALLOCATED  8.33.241.0/24             6461  ZAYO-6461, 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
23.140.216.0/24      Origin:     27176  DATAWAGON, US
23.140.216.0/24     Transit:     20278  NEXEON, US
23.141.0.0/24        Origin:    395350  RESERVED, ZZ
23.141.0.0/24       Transit:     11426  TWC-11426-CAROLINAS, US
23.161.72.0/24       Origin:     18646  BITMAX, US
23.161.72.0/24      Transit:      1299  TWELVE99 Arelion, fka Telia Carrier, SE
23.176.160.0/24      Origin:    397327  RESERVED, ZZ
23.176.160.0/24     Transit:     19108  SUDDENLINK-COMMUNICATIONS, US
36.255.139.0/24      Origin:     56050  NEW-SHINE-INTERNET-TH 134 Yenchit Road, 
36.255.139.0/24     Transit:     58913  HCL-TH 4819 Supapong 3 Alley, Srinakarin

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       /9:14      /10:39      /11:102     /12:298     
/13:579     /14:1197    /15:2067    /16:13508   /17:8287    /18:13858   
/19:25153   /20:44468   /21:51074   /22:109927  /23:99012   /24:556687  
/25:743     /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        6432        7346  UNI2-AS, ES
  8151        5678       11521  UNINET, MX
 39891        3632        4897  ALJAWWALSTC-AS, SA
 11492        3433        4523  CABLEONE, US
  6327        3345        3535  SHAW, CA
  7155        3124        4179  VIASAT-SP-BACKBONE, US
  8551        2927        3459  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
 22773        2603        3559  ASN-CXA-ALL-CCI-22773-RDC, US
 30036        2156        2498  MEDIACOM-ENTERPRISE-BUSINESS, US
 10620        2100        3537  Telmex Colombia S.A., CO

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

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

   1:2255      2:1388      3:250       4:5         5:4550      6:137    
   7:6         8:1550      9:1        11:172      12:1510     13:371    
  14:2313     15:302      16:196      17:370      18:633      20:281    
  21:4        22:188      23:6404     24:2503     25:6        27:2503   
  29:19       31:2531     32:80       34:25       35:118      36:1997   
  37:4523     38:5188     39:869      40:147      41:4015     42:2107   
  43:2283     44:322      45:16601    46:4279     47:386      49:1806   
  50:1866     51:595      52:1597     54:392      55:964      56:8      
  57:121      58:1865     59:1173     60:999      61:2499     62:2684   
  63:1928     64:5581     65:2325     66:4935     67:3029     68:1329   
  69:4139     70:1192     71:657      72:2962     74:2619     75:1565   
  76:623      77:2332     78:1834     79:2985     80:2113     81:1830   
  82:1460     83:1286     84:1516     85:2977     86:749      87:1991   
  88:1174     89:3837     90:617      91:7809     92:2066     93:2625   
  94:3527     95:4010     96:1296     97:321      98:1077     99:734    
 100:90      101:1078    102:2883    103:31999   104:4592    105:558    
 106:891     107:2599    108:1136    109:4229    110:2133    111:3185   
 112:2068    113:1812    114:1660    115:1988    116:1914    117:2440   
 118:2687    119:1988    120:1809    121:1152    122:2584    123:2186   
 124:1624    125:2522    128:1459    129:929     130:1038    131:1956   
 132:819     133:419     134:1791    135:307     136:911     137:970    
 138:2626    139:1584    140:1255    141:1294    142:1489    143:1483   
 144:998     145:346     146:1947    147:1607    148:2454    149:2175   
 150:867     151:1232    152:1874    153:512     154:4887    155:1394   
 156:1962    157:1323    158:1078    159:2232    160:2582    161:1587   
 162:3517    163:1593    164:1711    165:1827    166:1027    167:1733   
 168:3723    169:902     170:4669    171:872     172:3681    173:2962   
 174:990     175:1201    176:3790    177:4447    178:3549    179:2120   
 180:2427    181:3448    182:3356    183:1990    184:2286    185:20515  
 186:4720    187:4112    188:4158    189:3715    190:9263    191:1345   
 192:10959   193:8956    194:7264    195:5209    196:3108    197:2445   
 198:6010    199:6117    200:7955    201:6025    202:10548   203:10008  
 204:4550    205:3655    206:4327    207:3472    208:4148    209:4935   
 210:4473    211:2539    212:4230    213:3410    214:1094    215:59     
 216:6694    217:2771    218:1286    219:574     220:2032    221:978    
 222:837     223:2169   

End of report


More information about the sanog mailing list