[SANOG] Weekly Global IPv4 Routing Table Report

Routing Table Analysis Role Account cscora at apnic.net
Fri Dec 1 18:02:13 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 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:                              935768
    Prefixes after maximum aggregation (per Origin AS):          356557
    Deaggregation factor:                                          2.62
    Unique aggregates announced (without unneeded subnets):      455208
Total ASes present in the Internet Routing Table:                 75073
    Prefixes per ASN:                                             12.46
Origin-only ASes present in the Internet Routing Table:           64404
Origin ASes announcing only one prefix:                           26492
Transit ASes present in the Internet Routing Table:               10669
Transit-only ASes present in the Internet Routing Table:            483
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:              1061
    Number of instances of unregistered ASNs:                      1063
Number of 32-bit ASNs allocated by the RIRs:                      43144
Number of 32-bit ASNs visible in the Routing Table:               35456
Prefixes from 32-bit ASNs in the Routing Table:                  178175
Number of bogon 32-bit ASNs visible in the Routing Table:            31
Special use prefixes present in the Routing Table:                    1
Prefixes being announced from unallocated address space:            546
Number of addresses announced to Internet:                   3048735744
    Equivalent to 181 /8s, 184 /16s and 4 /24s
    Percentage of available address space announced:               82.3
    Percentage of allocated address space announced:               82.3
    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:      310346

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

Prefixes being announced by APNIC Region ASes:                   249452
    Total APNIC prefixes after maximum aggregation:               71994
    APNIC Deaggregation factor:                                    3.46
Prefixes being announced from the APNIC address blocks:          242709
    Unique aggregates announced from the APNIC address blocks:    99551
APNIC Region origin ASes present in the Internet Routing Table:   13806
    APNIC Prefixes per ASN:                                       17.58
APNIC Region origin ASes announcing only one prefix:               4163
APNIC Region transit ASes present in the Internet Routing Table:   1851
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:   9140
Number of APNIC addresses announced to Internet:              771358336
    Equivalent to 45 /8s, 249 /16s and 254 /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:                    273323
    Total ARIN prefixes after maximum aggregation:               124284
    ARIN Deaggregation factor:                                     2.20
Prefixes being announced from the ARIN address blocks:           278074
    Unique aggregates announced from the ARIN address blocks:    132552
ARIN Region origin ASes present in the Internet Routing Table:    19077
    ARIN Prefixes per ASN:                                        14.58
ARIN Region origin ASes announcing only one prefix:                6952
ARIN Region transit ASes present in the Internet Routing Table:    1959
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:    4825
Number of ARIN addresses announced to Internet:              1276777216
    Equivalent to 76 /8s, 26 /16s and 19 /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:                    262146
    Total RIPE prefixes after maximum aggregation:               124722
    RIPE Deaggregation factor:                                     2.10
Prefixes being announced from the RIPE address blocks:           256570
    Unique aggregates announced from the RIPE address blocks:    160402
RIPE Region origin ASes present in the Internet Routing Table:    28462
    RIPE Prefixes per ASN:                                         9.01
RIPE Region origin ASes announcing only one prefix:               12087
RIPE Region transit ASes present in the Internet Routing Table:    3941
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:   11454
Number of RIPE addresses announced to Internet:               714341504
    Equivalent to 42 /8s, 147 /16s and 252 /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:                  119707
    Total LACNIC prefixes after maximum aggregation:              28849
    LACNIC Deaggregation factor:                                   4.15
Prefixes being announced from the LACNIC address blocks:         118494
    Unique aggregates announced from the LACNIC address blocks:   49476
LACNIC Region origin ASes present in the Internet Routing Table:  11040
    LACNIC Prefixes per ASN:                                      10.73
LACNIC Region origin ASes announcing only one prefix:              2659
LACNIC Region transit ASes present in the Internet Routing Table:  2341
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:  8891
Number of LACNIC addresses announced to Internet:             178378496
    Equivalent to 10 /8s, 161 /16s and 215 /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:                  30079
    Total AfriNIC prefixes after maximum aggregation:              6012
    AfriNIC Deaggregation factor:                                  5.00
Prefixes being announced from the AfriNIC address blocks:         39375
    Unique aggregates announced from the AfriNIC address blocks:  12789
AfriNIC Region origin ASes present in the Internet Routing Table:  1805
    AfriNIC Prefixes per ASN:                                     21.81
AfriNIC Region origin ASes announcing only one prefix:              631
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:                       28
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 1146
Number of AfriNIC addresses announced to Internet:            107509760
    Equivalent to 6 /8s, 104 /16s and 120 /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        9761       8730      44  CHINAMOBILE-CN China Mobile Communicati
  7545        5681        785     696  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4919       4192      75  ERX-CERNET-BKB China Education and Rese
 18403        4388        347      25  FPT-AS-AP FPT Telecom Company, VN
  7713        3601       1047      70  TELKOMNET-AS-AP PT Telekomunikasi Indon
  9498        3384        494     250  BBIL-AP BHARTI Airtel Ltd., IN
 45899        3264       1872      99  VNPT-AS-VN VNPT Corp, VN
  7552        2987       1330      20  VIETEL-AS-AP Viettel Group, VN
 24560        2633        853     369  AIRTELBROADBAND-AS-AP Bharti Airtel Ltd
  4766        2484      11259     585  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        9360      11175    3339  AMAZON-02, US
 11492        4556        302     677  CABLEONE, US
  7155        4172        288      95  VIASAT-SP-BACKBONE, US
  6327        3559       1320      68  SHAW, CA
 22773        3510       3055     301  ASN-CXA-ALL-CCI-22773-RDC, US
   749        3164      54930    2416  DNIC-AS-00749, US
 16625        3157       1401    2315  AKAMAI-AS, US
   367        2995       3844    1423  DNIC-ASBLK-00306-00371, US
396982        2722       3631     372  GOOGLE-CLOUD-PLATFORM, US
  7018        2571      23618    1605  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        7511       1714     146  UNI2-AS, ES
 39891        4570        271      54  ALJAWWALSTC-AS, SA
 20940        4004       3397     142  AKAMAI-ASN1, NL
  9009        3465        299    1610  M247, RO
  8551        3436        368      34  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
 12389        2950       2299     909  ROSTELECOM-AS, RU
 34984        2327        361     586  TELLCOM-AS, TR
 58224        1611        895     587  TCI, IR
 13188        1607        100      26  TRIOLAN, UA
  8452        1515       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       12108       3377     602  UNINET, MX
 10620        3525        499     870  Telmex Colombia S.A., CO
 13999        2475        338     645  Mega Cable, S.A. de C.V., MX
 11830        2009        369      64  Instituto Costarricense de Electricidad
 28573        1339       2321     242  Claro NXT Telecomunicacoes Ltda, BR
  3816        1306        787     197  COLOMBIA TELECOMUNICACIONES S.A. ESP, C
  6503        1248        341     504  Axtel, S.A.B. de C.V., MX
 11664        1084        173     434  Techtel LMDS Comunicaciones Interactiva
  6147        1083        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        1594        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        1046         67      51  ORANGE-COTE-IVOIRE, CI
 36935         936        521      43  Vodafone-, EG
  6713         550       1861      34  IAM-AS, MA
 15399         535         55      54  WANANCHI-, KE
 37342         492         32       1  MOVITEL, MZ
 24757         482         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       12108       3377     602  UNINET, MX
  9808        9761       8730      44  CHINAMOBILE-CN China Mobile Communicati
 16509        9360      11175    3339  AMAZON-02, US
 12479        7511       1714     146  UNI2-AS, ES
  7545        5681        785     696  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4919       4192      75  ERX-CERNET-BKB China Education and Rese
 39891        4570        271      54  ALJAWWALSTC-AS, SA
 11492        4556        302     677  CABLEONE, US
 18403        4388        347      25  FPT-AS-AP FPT Telecom Company, VN
  7155        4172        288      95  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        9761         9717  CHINAMOBILE-CN China Mobile Communications Grou
 12479        7511         7365  UNI2-AS, ES
 16509        9360         6021  AMAZON-02, US
  7545        5681         4985  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4919         4844  ERX-CERNET-BKB China Education and Research Net
 39891        4570         4516  ALJAWWALSTC-AS, SA
 18403        4388         4363  FPT-AS-AP FPT Telecom Company, VN
  7155        4172         4077  VIASAT-SP-BACKBONE, US
 11492        4556         3879  CABLEONE, US
 20940        4004         3862  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     /14:1191    /15:2062    /16:13464   /17:8297    /18:13824   
/19:25122   /20:44345   /21:51569   /22:110719  /23:99649   /24:563748  
/25:731     /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        6604        7511  UNI2-AS, ES
  8151        6127       12108  UNINET, MX
 11492        3470        4556  CABLEONE, US
  6327        3367        3559  SHAW, CA
 39891        3324        4570  ALJAWWALSTC-AS, SA
  7155        3119        4172  VIASAT-SP-BACKBONE, US
  8551        2913        3436  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
 22773        2563        3510  ASN-CXA-ALL-CCI-22773-RDC, US
 30036        2137        2481  MEDIACOM-ENTERPRISE-BUSINESS, US
 10620        2118        3525  Telmex Colombia S.A., CO

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

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

   1:2269      2:1433      3:278       4:5         5:4393      6:160    
   7:6         8:1531      9:1        11:172      12:1491     13:373    
  14:2324     15:303      16:205      17:362      18:691      20:319    
  21:4        22:188      23:6522     24:2570     25:2        27:2525   
  29:19       31:2543     32:56       34:32       35:119      36:2040   
  37:4459     38:5692     39:881      40:150      41:3973     42:2120   
  43:2327     44:332      45:16658    46:4392     47:310      49:1896   
  50:1883     51:573      52:1594     54:393      55:875      56:5      
  57:127      58:1906     59:1175     60:1009     61:2565     62:2727   
  63:1904     64:5479     65:2343     66:5018     67:3056     68:1356   
  69:4104     70:1186     71:605      72:2930     74:2629     75:1561   
  76:628      77:2335     78:1828     79:3024     80:2109     81:1848   
  82:1520     83:1321     84:1624     85:2987     86:780      87:1944   
  88:1233     89:3950     90:636      91:7886     92:2157     93:2640   
  94:3576     95:3990     96:1299     97:315      98:1014     99:738    
 100:94      101:1177    102:2975    103:32493   104:4795    105:593    
 106:982     107:2733    108:1140    109:4217    110:2134    111:3197   
 112:2086    113:1759    114:1739    115:1992    116:1948    117:2494   
 118:2748    119:1952    120:1809    121:1285    122:2639    123:2215   
 124:1636    125:2779    128:1485    129:918     130:1055    131:1983   
 132:831     133:410     134:1707    135:301     136:917     137:990    
 138:2716    139:1581    140:1342    141:1350    142:1541    143:1527   
 144:1000    145:343     146:1990    147:1635    148:2456    149:2327   
 150:1009    151:1290    152:1839    153:526     154:5287    155:1378   
 156:2126    157:1358    158:1053    159:2208    160:2618    161:1620   
 162:3568    163:1635    164:1639    165:1862    166:1113    167:1770   
 168:3836    169:799     170:4685    171:964     172:3764    173:3002   
 174:906     175:1205    176:3626    177:4569    178:3533    179:2189   
 180:2286    181:3604    182:3444    183:2026    184:2254    185:20447  
 186:4756    187:4285    188:3963    189:3968    190:9313    191:1502   
 192:11004   193:8974    194:7295    195:5212    196:3130    197:2492   
 198:6028    199:6599    200:8090    201:6237    202:10596   203:10065  
 204:4599    205:3680    206:4436    207:3511    208:4106    209:4910   
 210:4529    211:2560    212:4228    213:3395    214:1126    215:64     
 216:6730    217:2751    218:1322    219:586     220:2029    221:1011   
 222:876     223:2225   

End of report


More information about the sanog mailing list