[SANOG] Weekly Global IPv4 Routing Table Report

Routing Table Analysis Role Account cscora at apnic.net
Fri Dec 8 18:02:14 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 09 Dec, 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:                              936367
    Prefixes after maximum aggregation (per Origin AS):          357087
    Deaggregation factor:                                          2.62
    Unique aggregates announced (without unneeded subnets):      455742
Total ASes present in the Internet Routing Table:                 75116
    Prefixes per ASN:                                             12.47
Origin-only ASes present in the Internet Routing Table:           64439
Origin ASes announcing only one prefix:                           26531
Transit ASes present in the Internet Routing Table:               10677
Transit-only ASes present in the Internet Routing Table:            474
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:              1031
    Number of instances of unregistered ASNs:                      1033
Number of 32-bit ASNs allocated by the RIRs:                      43201
Number of 32-bit ASNs visible in the Routing Table:               35494
Prefixes from 32-bit ASNs in the Routing Table:                  178380
Number of bogon 32-bit ASNs visible in the Routing Table:            18
Special use prefixes present in the Routing Table:                    1
Prefixes being announced from unallocated address space:            514
Number of addresses announced to Internet:                   3049008640
    Equivalent to 181 /8s, 188 /16s and 46 /24s
    Percentage of available address space announced:               82.4
    Percentage of allocated address space announced:               82.4
    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:      310382

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

Prefixes being announced by APNIC Region ASes:                   249706
    Total APNIC prefixes after maximum aggregation:               72069
    APNIC Deaggregation factor:                                    3.46
Prefixes being announced from the APNIC address blocks:          242887
    Unique aggregates announced from the APNIC address blocks:    99410
APNIC Region origin ASes present in the Internet Routing Table:   13816
    APNIC Prefixes per ASN:                                       17.58
APNIC Region origin ASes announcing only one prefix:               4152
APNIC Region transit ASes present in the Internet Routing Table:   1861
Average APNIC Region AS path length visible:                        4.4
    Max APNIC Region AS path length visible:                         32
Number of APNIC region 32-bit ASNs visible in the Routing Table:   9149
Number of APNIC addresses announced to Internet:              771420032
    Equivalent to 45 /8s, 250 /16s and 239 /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:                    273633
    Total ARIN prefixes after maximum aggregation:               124620
    ARIN Deaggregation factor:                                     2.20
Prefixes being announced from the ARIN address blocks:           278333
    Unique aggregates announced from the ARIN address blocks:    132968
ARIN Region origin ASes present in the Internet Routing Table:    19075
    ARIN Prefixes per ASN:                                        14.59
ARIN Region origin ASes announcing only one prefix:                6950
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:                          25
Number of ARIN region 32-bit ASNs visible in the Routing Table:    4818
Number of ARIN addresses announced to Internet:              1276553984
    Equivalent to 76 /8s, 22 /16s and 171 /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:                    261778
    Total RIPE prefixes after maximum aggregation:               124834
    RIPE Deaggregation factor:                                     2.10
Prefixes being announced from the RIPE address blocks:           256282
    Unique aggregates announced from the RIPE address blocks:    160693
RIPE Region origin ASes present in the Internet Routing Table:    28495
    RIPE Prefixes per ASN:                                         8.99
RIPE Region origin ASes announcing only one prefix:               12114
RIPE Region transit ASes present in the Internet Routing Table:    3944
Average RIPE Region AS path length visible:                         4.3
    Max RIPE Region AS path length visible:                          37
Number of RIPE region 32-bit ASNs visible in the Routing Table:   11473
Number of RIPE addresses announced to Internet:               714656896
    Equivalent to 42 /8s, 152 /16s and 204 /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:                  119803
    Total LACNIC prefixes after maximum aggregation:              28851
    LACNIC Deaggregation factor:                                   4.15
Prefixes being announced from the LACNIC address blocks:         118552
    Unique aggregates announced from the LACNIC address blocks:   49442
LACNIC Region origin ASes present in the Internet Routing Table:  11059
    LACNIC Prefixes per ASN:                                      10.72
LACNIC Region origin ASes announcing only one prefix:              2679
LACNIC Region transit ASes present in the Internet Routing Table:  2360
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:  8903
Number of LACNIC addresses announced to Internet:             178422784
    Equivalent to 10 /8s, 162 /16s and 132 /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:                  30416
    Total AfriNIC prefixes after maximum aggregation:              6040
    AfriNIC Deaggregation factor:                                  5.04
Prefixes being announced from the AfriNIC address blocks:         39799
    Unique aggregates announced from the AfriNIC address blocks:  12809
AfriNIC Region origin ASes present in the Internet Routing Table:  1811
    AfriNIC Prefixes per ASN:                                     21.98
AfriNIC Region origin ASes announcing only one prefix:              636
AfriNIC Region transit ASes present in the Internet Routing Table:  349
Average AfriNIC Region AS path length visible:                      5.0
    Max AfriNIC Region AS path length visible:                       27
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 1151
Number of AfriNIC addresses announced to Internet:            107593728
    Equivalent to 6 /8s, 105 /16s and 192 /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        9769       8730      44  CHINAMOBILE-CN China Mobile Communicati
  7545        5678        784     691  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4925       4192      75  ERX-CERNET-BKB China Education and Rese
 18403        4419        347      25  FPT-AS-AP FPT Telecom Company, VN
  7713        3602       1047      70  TELKOMNET-AS-AP PT Telekomunikasi Indon
  9498        3387        494     252  BBIL-AP BHARTI Airtel Ltd., IN
 45899        3266       1872      99  VNPT-AS-VN VNPT Corp, VN
  7552        2988       1330      20  VIETEL-AS-AP Viettel Group, VN
 24560        2640        853     366  AIRTELBROADBAND-AS-AP Bharti Airtel Ltd
  4766        2485      11259     586  KIXS-AS-KR Korea Telecom, KR

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        9463      11189    3329  AMAZON-02, US
 11492        4561        303     681  CABLEONE, US
  7155        4175        288      96  VIASAT-SP-BACKBONE, US
  6327        3560       1320      68  SHAW, CA
 22773        3507       3055     301  ASN-CXA-ALL-CCI-22773-RDC, US
 16625        3188       1418    2330  AKAMAI-AS, US
   749        3163      54930    2415  DNIC-AS-00749, US
   367        2988       3842    1417  DNIC-ASBLK-00306-00371, US
396982        2724       3631     375  GOOGLE-CLOUD-PLATFORM, US
  7018        2576      23628    1594  ATT-INTERNET4, 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        7555       1714     146  UNI2-AS, ES
 39891        4502        267      55  ALJAWWALSTC-AS, SA
 20940        4010       3397     142  AKAMAI-ASN1, NL
  9009        3482        299    1634  M247, RO
 12389        2948       2299     905  ROSTELECOM-AS, RU
  8551        2940        368      34  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
 34984        2326        360     590  TELLCOM-AS, TR
 58224        1610        895     586  TCI, IR
 13188        1607        100      26  TRIOLAN, UA
  8452        1521       1852      14  TE-AS TE-AS, EG

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       12133       3379     595  UNINET, MX
 10620        3518        496     885  Telmex Colombia S.A., CO
 13999        2482        338     637  Mega Cable, S.A. de C.V., MX
 11830        2004        369      64  Instituto Costarricense de Electricidad
 28573        1345       2321     241  Claro NXT Telecomunicacoes Ltda, BR
  3816        1306        787     197  COLOMBIA TELECOMUNICACIONES S.A. ESP, C
  6503        1242        341     503  Axtel, S.A.B. de C.V., MX
 11664        1099        175     434  Techtel LMDS Comunicaciones Interactiva
  6147        1080        369      22  Telefonica del Peru S.A.A., PE
 26615        1048       2502      52  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        1591        389      16  LINKdotNET-AS, EG
 24835        1548        545      28  RAYA-AS, EG
 36992        1359       1518     280  ETISALAT-MISR, EG
 36903        1248        553      98  MT-MPLS, MA
 29571        1045         67      51  ORANGE-COTE-IVOIRE, CI
 36935         936        521      43  Vodafone-, EG
  6713         550       1861      34  IAM-AS, MA
 15399         534         55      54  WANANCHI-, KE
 36914         521         82       3  KENET-AS, KE
 37342         491         32       1  MOVITEL, MZ

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       12133       3379     595  UNINET, MX
  9808        9769       8730      44  CHINAMOBILE-CN China Mobile Communicati
 16509        9463      11189    3329  AMAZON-02, US
 12479        7555       1714     146  UNI2-AS, ES
  7545        5678        784     691  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4925       4192      75  ERX-CERNET-BKB China Education and Rese
 11492        4561        303     681  CABLEONE, US
 39891        4502        267      55  ALJAWWALSTC-AS, SA
 18403        4419        347      25  FPT-AS-AP FPT Telecom Company, VN
  7155        4175        288      96  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        9769         9725  CHINAMOBILE-CN China Mobile Communications Grou
 12479        7555         7409  UNI2-AS, ES
 16509        9463         6134  AMAZON-02, US
  7545        5678         4987  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4925         4850  ERX-CERNET-BKB China Education and Research Net
 39891        4502         4447  ALJAWWALSTC-AS, SA
 18403        4419         4394  FPT-AS-AP FPT Telecom Company, VN
  7155        4175         4079  VIASAT-SP-BACKBONE, US
 11492        4561         3880  CABLEONE, US
 20940        4010         3868  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
     65536  DOCUMENT     5.102.30.0/24            65512  -Private Use AS-, ZZ
     33492  UNALLOCATED  8.6.184.0/23             33650  COMCAST-33650, US
     33123  UNALLOCATED  8.10.69.0/24               174  COGENT-174, 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

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
23.176.160.0/24      Origin:    397327  RESERVED, ZZ
23.176.160.0/24     Transit:     19108  SUDDENLINK-COMMUNICATIONS, US
23.189.192.0/24      Origin:     27593  RESERVED, ZZ
23.189.192.0/24     Transit:       174  COGENT-174, 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      /10:38      /11:99      /12:298     
/13:582     /14:1192    /15:2063    /16:13465   /17:8304    /18:13845   
/19:25143   /20:44391   /21:51626   /22:110750  /23:99737   /24:564071  
/25:733     /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        6644        7555  UNI2-AS, ES
  8151        6147       12133  UNINET, MX
 11492        3475        4561  CABLEONE, US
  6327        3367        3560  SHAW, CA
 39891        3256        4502  ALJAWWALSTC-AS, SA
  7155        3119        4175  VIASAT-SP-BACKBONE, US
 22773        2560        3507  ASN-CXA-ALL-CCI-22773-RDC, US
  8551        2417        2940  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
 30036        2126        2471  MEDIACOM-ENTERPRISE-BUSINESS, US
 10620        2121        3518  Telmex Colombia S.A., CO

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

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

   1:2273      2:1422      3:280       4:5         5:4395      6:160    
   7:6         8:1534      9:1        11:172      12:1488     13:374    
  14:2328     15:304      16:206      17:362      18:707      20:328    
  21:4        22:188      23:6546     24:2599     25:2        27:2525   
  29:19       31:2543     32:56       34:33       35:119      36:2046   
  37:4466     38:5711     39:881      40:150      41:4104     42:2141   
  43:2335     44:329      45:16698    46:4394     47:286      49:1901   
  50:1889     51:573      52:1598     54:395      55:803      56:5      
  57:127      58:1919     59:1177     60:1007     61:2565     62:2728   
  63:1911     64:5463     65:2342     66:5032     67:3052     68:1356   
  69:4083     70:1183     71:606      72:2932     74:2641     75:1564   
  76:628      77:2275     78:1823     79:2994     80:2122     81:1863   
  82:1518     83:1325     84:1625     85:2978     86:784      87:1967   
  88:1236     89:3929     90:641      91:7884     92:2176     93:2639   
  94:3580     95:3994     96:1299     97:316      98:1017     99:738    
 100:94      101:1150    102:2996    103:32494   104:4793    105:594    
 106:986     107:2747    108:1140    109:3760    110:2137    111:3195   
 112:2083    113:1762    114:1751    115:1993    116:1954    117:2493   
 118:2752    119:1949    120:1808    121:1290    122:2639    123:2217   
 124:1646    125:2780    128:1485    129:915     130:1057    131:1982   
 132:835     133:410     134:1707    135:295     136:914     137:987    
 138:2712    139:1577    140:1343    141:1347    142:1541    143:1525   
 144:1009    145:344     146:1987    147:1638    148:2471    149:2377   
 150:1011    151:1289    152:1831    153:527     154:5310    155:1377   
 156:2133    157:1369    158:1085    159:2204    160:2618    161:1616   
 162:3564    163:1646    164:1637    165:1866    166:1110    167:1769   
 168:3848    169:799     170:4695    171:966     172:3762    173:3003   
 174:905     175:1212    176:3607    177:4570    178:3532    179:2231   
 180:2310    181:3598    182:3442    183:2024    184:2252    185:20481  
 186:4747    187:4270    188:4001    189:3974    190:9326    191:1494   
 192:11018   193:8978    194:7301    195:5225    196:3143    197:2654   
 198:6026    199:6662    200:8061    201:6242    202:10593   203:10068  
 204:4601    205:3675    206:4440    207:3498    208:4107    209:4933   
 210:4542    211:2560    212:4217    213:3395    214:1116    215:63     
 216:6752    217:2747    218:1324    219:587     220:2026    221:1014   
 222:880     223:2228   

End of report


More information about the sanog mailing list