[SANOG] Weekly Global IPv4 Routing Table Report

Routing Table Analysis Role Account cscora at apnic.net
Fri Nov 24 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 25 Nov, 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:                              935642
    Prefixes after maximum aggregation (per Origin AS):          356140
    Deaggregation factor:                                          2.63
    Unique aggregates announced (without unneeded subnets):      454675
Total ASes present in the Internet Routing Table:                 75088
    Prefixes per ASN:                                             12.46
Origin-only ASes present in the Internet Routing Table:           64431
Origin ASes announcing only one prefix:                           26523
Transit ASes present in the Internet Routing Table:               10657
Transit-only ASes present in the Internet Routing Table:            478
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:              1036
    Number of instances of unregistered ASNs:                      1038
Number of 32-bit ASNs allocated by the RIRs:                      43101
Number of 32-bit ASNs visible in the Routing Table:               35439
Prefixes from 32-bit ASNs in the Routing Table:                  178053
Number of bogon 32-bit ASNs visible in the Routing Table:            29
Special use prefixes present in the Routing Table:                    1
Prefixes being announced from unallocated address space:            525
Number of addresses announced to Internet:                   3049330944
    Equivalent to 181 /8s, 193 /16s and 25 /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:      310583

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

Prefixes being announced by APNIC Region ASes:                   249008
    Total APNIC prefixes after maximum aggregation:               71753
    APNIC Deaggregation factor:                                    3.47
Prefixes being announced from the APNIC address blocks:          242249
    Unique aggregates announced from the APNIC address blocks:    99279
APNIC Region origin ASes present in the Internet Routing Table:   13790
    APNIC Prefixes per ASN:                                       17.57
APNIC Region origin ASes announcing only one prefix:               4151
APNIC Region transit ASes present in the Internet Routing Table:   1859
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:   9120
Number of APNIC addresses announced to Internet:              771834752
    Equivalent to 46 /8s, 1 /16s and 67 /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:                    273658
    Total ARIN prefixes after maximum aggregation:               124133
    ARIN Deaggregation factor:                                     2.20
Prefixes being announced from the ARIN address blocks:           278450
    Unique aggregates announced from the ARIN address blocks:    132343
ARIN Region origin ASes present in the Internet Routing Table:    19075
    ARIN Prefixes per ASN:                                        14.60
ARIN Region origin ASes announcing only one prefix:                6959
ARIN Region transit ASes present in the Internet Routing Table:    1954
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:    4829
Number of ARIN addresses announced to Internet:              1276687360
    Equivalent to 76 /8s, 24 /16s and 180 /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:                    262273
    Total RIPE prefixes after maximum aggregation:               124809
    RIPE Deaggregation factor:                                     2.10
Prefixes being announced from the RIPE address blocks:           256705
    Unique aggregates announced from the RIPE address blocks:    160488
RIPE Region origin ASes present in the Internet Routing Table:    28493
    RIPE Prefixes per ASN:                                         9.01
RIPE Region origin ASes announcing only one prefix:               12114
RIPE Region transit ASes present in the Internet Routing Table:    3936
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:   11457
Number of RIPE addresses announced to Internet:               714615424
    Equivalent to 42 /8s, 152 /16s and 42 /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:                  119594
    Total LACNIC prefixes after maximum aggregation:              28735
    LACNIC Deaggregation factor:                                   4.16
Prefixes being announced from the LACNIC address blocks:         118364
    Unique aggregates announced from the LACNIC address blocks:   49362
LACNIC Region origin ASes present in the Internet Routing Table:  11047
    LACNIC Prefixes per ASN:                                      10.71
LACNIC Region origin ASes announcing only one prefix:              2668
LACNIC Region transit ASes present in the Internet Routing Table:  2340
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:  8886
Number of LACNIC addresses announced to Internet:             178433792
    Equivalent to 10 /8s, 162 /16s and 175 /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:                  30073
    Total AfriNIC prefixes after maximum aggregation:              6016
    AfriNIC Deaggregation factor:                                  5.00
Prefixes being announced from the AfriNIC address blocks:         39349
    Unique aggregates announced from the AfriNIC address blocks:  12770
AfriNIC Region origin ASes present in the Internet Routing Table:  1807
    AfriNIC Prefixes per ASN:                                     21.78
AfriNIC Region origin ASes announcing only one prefix:              631
AfriNIC Region transit ASes present in the Internet Routing Table:  352
Average AfriNIC Region AS path length visible:                      4.9
    Max AfriNIC Region AS path length visible:                       28
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 1147
Number of AfriNIC addresses announced to Internet:            107395840
    Equivalent to 6 /8s, 102 /16s and 187 /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        9751       8730      44  CHINAMOBILE-CN China Mobile Communicati
  7545        5686        785     697  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4918       4192      75  ERX-CERNET-BKB China Education and Rese
 18403        4333        347      25  FPT-AS-AP FPT Telecom Company, VN
  7713        3600       1047      70  TELKOMNET-AS-AP PT Telekomunikasi Indon
  9498        3381        494     247  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        2616        853     365  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        9350      11143    3300  AMAZON-02, US
 11492        4559        302     677  CABLEONE, US
  7155        4175        288      98  VIASAT-SP-BACKBONE, US
  6327        3559       1320      68  SHAW, CA
 22773        3510       3055     301  ASN-CXA-ALL-CCI-22773-RDC, US
   749        3159      54932    2411  DNIC-AS-00749, US
 16625        3144       1393    2310  AKAMAI-AS, US
   367        3010       3861    1416  DNIC-ASBLK-00306-00371, US
396982        2722       3631     374  GOOGLE-CLOUD-PLATFORM, US
  7018        2584      23619    1601  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        7471       1714     146  UNI2-AS, ES
 39891        4570        271      54  ALJAWWALSTC-AS, SA
 20940        4010       3397     142  AKAMAI-ASN1, NL
  9009        3458        299    1612  M247, RO
  8551        3433        368      34  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
 12389        2946       2296     918  ROSTELECOM-AS, RU
 34984        2321        361     589  TELLCOM-AS, TR
 13188        1607        100      26  TRIOLAN, UA
 58224        1602        895     608  TCI, IR
  8452        1527       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       12075       3376     603  UNINET, MX
 10620        3528        499     871  Telmex Colombia S.A., CO
 13999        2469        337     645  Mega Cable, S.A. de C.V., MX
 11830        2009        369      64  Instituto Costarricense de Electricidad
 28573        1329       2321     248  Claro NXT Telecomunicacoes Ltda, BR
  3816        1302        781     197  COLOMBIA TELECOMUNICACIONES S.A. ESP, C
  6503        1250        342     505  Axtel, S.A.B. de C.V., MX
  6147        1082        369      22  Telefonica del Peru S.A.A., PE
 11664        1080        173     437  Techtel LMDS Comunicaciones Interactiva
 26615        1040       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        1600        389      16  LINKdotNET-AS, EG
 24835        1548        545      28  RAYA-AS, EG
 36992        1358       1518     280  ETISALAT-MISR, EG
 36903        1248        553      98  MT-MPLS, MA
 29571        1045         67      53  ORANGE-COTE-IVOIRE, CI
 36935         935        521      43  Vodafone-, EG
  6713         550       1861      34  IAM-AS, MA
 15399         522         54      47  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       12075       3376     603  UNINET, MX
  9808        9751       8730      44  CHINAMOBILE-CN China Mobile Communicati
 16509        9350      11143    3300  AMAZON-02, US
 12479        7471       1714     146  UNI2-AS, ES
  7545        5686        785     697  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4918       4192      75  ERX-CERNET-BKB China Education and Rese
 39891        4570        271      54  ALJAWWALSTC-AS, SA
 11492        4559        302     677  CABLEONE, US
 18403        4333        347      25  FPT-AS-AP FPT Telecom Company, VN
  7155        4175        288      98  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        9751         9707  CHINAMOBILE-CN China Mobile Communications Grou
 12479        7471         7325  UNI2-AS, ES
 16509        9350         6050  AMAZON-02, US
  7545        5686         4989  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4918         4843  ERX-CERNET-BKB China Education and Research Net
 39891        4570         4516  ALJAWWALSTC-AS, SA
 18403        4333         4308  FPT-AS-AP FPT Telecom Company, VN
  7155        4175         4077  VIASAT-SP-BACKBONE, US
 11492        4559         3882  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     /14:1194    /15:2060    /16:13465   /17:8298    /18:13834   
/19:25150   /20:44384   /21:51581   /22:110716  /23:99682   /24:563499  
/25:732     /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        6565        7471  UNI2-AS, ES
  8151        6097       12075  UNINET, MX
 11492        3472        4559  CABLEONE, US
  6327        3367        3559  SHAW, CA
 39891        3324        4570  ALJAWWALSTC-AS, SA
  7155        3122        4175  VIASAT-SP-BACKBONE, US
  8551        2910        3433  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
 22773        2563        3510  ASN-CXA-ALL-CCI-22773-RDC, US
 30036        2136        2481  MEDIACOM-ENTERPRISE-BUSINESS, US
 10620        2121        3528  Telmex Colombia S.A., CO

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

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

   1:2261      2:1430      3:276       4:5         5:4390      6:162    
   7:6         8:1533      9:1        11:172      12:1494     13:375    
  14:2322     15:303      16:206      17:364      18:684      20:319    
  21:4        22:188      23:6511     24:2571     25:2        27:2520   
  29:19       31:2538     32:58       34:32       35:118      36:2031   
  37:4453     38:5678     39:878      40:149      41:3984     42:2076   
  43:2323     44:330      45:16693    46:4397     47:373      49:1861   
  50:1885     51:573      52:1593     54:393      55:877      56:5      
  57:127      58:1899     59:1177     60:1007     61:2561     62:2731   
  63:1903     64:5478     65:2351     66:5036     67:3060     68:1354   
  69:4124     70:1190     71:605      72:2924     74:2637     75:1560   
  76:628      77:2329     78:1826     79:3019     80:2110     81:1848   
  82:1518     83:1311     84:1617     85:2980     86:781      87:1953   
  88:1239     89:3950     90:631      91:7879     92:2145     93:2647   
  94:3577     95:3994     96:1298     97:316      98:1084     99:738    
 100:96      101:1174    102:2953    103:32456   104:4793    105:592    
 106:982     107:2770    108:1140    109:4208    110:2134    111:3172   
 112:2082    113:1754    114:1726    115:1982    116:1935    117:2484   
 118:2741    119:1951    120:1806    121:1260    122:2632    123:2231   
 124:1629    125:2781    128:1485    129:916     130:1053    131:1978   
 132:828     133:407     134:1705    135:299     136:922     137:1037   
 138:2697    139:1581    140:1336    141:1331    142:1533    143:1521   
 144:1006    145:343     146:1986    147:1635    148:2458    149:2306   
 150:1009    151:1255    152:1839    153:525     154:5278    155:1382   
 156:2108    157:1356    158:1056    159:2209    160:2608    161:1604   
 162:3568    163:1631    164:1650    165:1864    166:1107    167:1764   
 168:3845    169:801     170:4678    171:965     172:3765    173:2999   
 174:958     175:1203    176:3628    177:4537    178:3525    179:2167   
 180:2272    181:3592    182:3408    183:2021    184:2274    185:20510  
 186:4770    187:4281    188:4075    189:3956    190:9306    191:1456   
 192:11021   193:8977    194:7317    195:5209    196:3131    197:2471   
 198:6039    199:6535    200:8084    201:6234    202:10598   203:10050  
 204:4575    205:3703    206:4434    207:3507    208:4112    209:4921   
 210:4522    211:2545    212:4245    213:3386    214:1116    215:70     
 216:6727    217:2750    218:1325    219:586     220:2030    221:1003   
 222:870     223:2216   

End of report


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