[SANOG] Weekly Global IPv4 Routing Table Report

Routing Table Analysis Role Account cscora at apnic.net
Fri Sep 29 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 30 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:                              930281
    Prefixes after maximum aggregation (per Origin AS):          353509
    Deaggregation factor:                                          2.63
    Unique aggregates announced (without unneeded subnets):      453312
Total ASes present in the Internet Routing Table:                 74874
    Prefixes per ASN:                                             12.42
Origin-only ASes present in the Internet Routing Table:           64269
Origin ASes announcing only one prefix:                           26434
Transit ASes present in the Internet Routing Table:               10605
Transit-only ASes present in the Internet Routing Table:            460
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:              1003
    Number of instances of unregistered ASNs:                      1005
Number of 32-bit ASNs allocated by the RIRs:                      42726
Number of 32-bit ASNs visible in the Routing Table:               35176
Prefixes from 32-bit ASNs in the Routing Table:                  175775
Number of bogon 32-bit ASNs visible in the Routing Table:            54
Special use prefixes present in the Routing Table:                    1
Prefixes being announced from unallocated address space:            527
Number of addresses announced to Internet:                   3053878912
    Equivalent to 182 /8s, 6 /16s and 126 /24s
    Percentage of available address space announced:               82.5
    Percentage of allocated address space announced:               82.5
    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:      309201

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

Prefixes being announced by APNIC Region ASes:                   247043
    Total APNIC prefixes after maximum aggregation:               70962
    APNIC Deaggregation factor:                                    3.48
Prefixes being announced from the APNIC address blocks:          240653
    Unique aggregates announced from the APNIC address blocks:    98905
APNIC Region origin ASes present in the Internet Routing Table:   13679
    APNIC Prefixes per ASN:                                       17.59
APNIC Region origin ASes announcing only one prefix:               4094
APNIC Region transit ASes present in the Internet Routing Table:   1821
Average APNIC Region AS path length visible:                        4.4
    Max APNIC Region AS path length visible:                         27
Number of APNIC region 32-bit ASNs visible in the Routing Table:   9004
Number of APNIC addresses announced to Internet:              772959104
    Equivalent to 46 /8s, 18 /16s and 107 /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:                    272579
    Total ARIN prefixes after maximum aggregation:               123726
    ARIN Deaggregation factor:                                     2.20
Prefixes being announced from the ARIN address blocks:           276203
    Unique aggregates announced from the ARIN address blocks:    131912
ARIN Region origin ASes present in the Internet Routing Table:    19097
    ARIN Prefixes per ASN:                                        14.46
ARIN Region origin ASes announcing only one prefix:                6956
ARIN Region transit ASes present in the Internet Routing Table:    1960
Average ARIN Region AS path length visible:                         3.6
    Max ARIN Region AS path length visible:                          24
Number of ARIN region 32-bit ASNs visible in the Routing Table:    4829
Number of ARIN addresses announced to Internet:              1277916160
    Equivalent to 76 /8s, 43 /16s and 116 /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:                    261556
    Total RIPE prefixes after maximum aggregation:               123664
    RIPE Deaggregation factor:                                     2.12
Prefixes being announced from the RIPE address blocks:           256783
    Unique aggregates announced from the RIPE address blocks:    160050
RIPE Region origin ASes present in the Internet Routing Table:    28418
    RIPE Prefixes per ASN:                                         9.04
RIPE Region origin ASes announcing only one prefix:               12056
RIPE Region transit ASes present in the Internet Routing Table:    3946
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:   11354
Number of RIPE addresses announced to Internet:               716413824
    Equivalent to 42 /8s, 179 /16s and 155 /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:                  118194
    Total LACNIC prefixes after maximum aggregation:              28513
    LACNIC Deaggregation factor:                                   4.15
Prefixes being announced from the LACNIC address blocks:         117113
    Unique aggregates announced from the LACNIC address blocks:   49363
LACNIC Region origin ASes present in the Internet Routing Table:  11037
    LACNIC Prefixes per ASN:                                      10.61
LACNIC Region origin ASes announcing only one prefix:              2705
LACNIC Region transit ASes present in the Internet Routing Table:  2334
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:  8855
Number of LACNIC addresses announced to Internet:             178491776
    Equivalent to 10 /8s, 163 /16s and 145 /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:                  29906
    Total AfriNIC prefixes after maximum aggregation:              5948
    AfriNIC Deaggregation factor:                                  5.03
Prefixes being announced from the AfriNIC address blocks:         39002
    Unique aggregates announced from the AfriNIC address blocks:  12642
AfriNIC Region origin ASes present in the Internet Routing Table:  1790
    AfriNIC Prefixes per ASN:                                     21.79
AfriNIC Region origin ASes announcing only one prefix:              623
AfriNIC Region transit ASes present in the Internet Routing Table:  335
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: 1134
Number of AfriNIC addresses announced to Internet:            107671808
    Equivalent to 6 /8s, 106 /16s and 241 /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        9495       8730      44  CHINAMOBILE-CN China Mobile Communicati
  7545        5735        785     698  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4938       4192      75  ERX-CERNET-BKB China Education and Rese
 18403        4231        347      25  FPT-AS-AP FPT Telecom Company, VN
  7713        3592       1043      63  TELKOMNET-AS-AP PT Telekomunikasi Indon
 45899        3331       1840      96  VNPT-AS-VN VNPT Corp, VN
  9498        3188        498     251  BBIL-AP BHARTI Airtel Ltd., IN
  7552        2940       1330      20  VIETEL-AS-AP Viettel Group, VN
  4766        2540      11270     601  KIXS-AS-KR Korea Telecom, KR
 24560        2517        848     383  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        9098      10992    3232  AMAZON-02, US
 11492        4535        301     668  CABLEONE, US
  7155        4177        288     100  VIASAT-SP-BACKBONE, US
  6327        3546       1319      66  SHAW, CA
 22773        3529       3055     302  ASN-CXA-ALL-CCI-22773-RDC, US
   749        3151      54959    2403  DNIC-AS-00749, US
   367        3002       3822    1418  DNIC-ASBLK-00306-00371, US
 16625        2987       1409    2288  AKAMAI-AS, US
396982        2698       3597     395  GOOGLE-CLOUD-PLATFORM, US
 30036        2498        359     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        7389       1713     145  UNI2-AS, ES
 39891        4897        290      61  ALJAWWALSTC-AS, SA
 20940        4073       3398     153  AKAMAI-ASN1, NL
  8551        3446        368      34  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
 12389        2980       2296     915  ROSTELECOM-AS, RU
  9009        2897        264    1483  M247, RO
 34984        2334        361     596  TELLCOM-AS, TR
 58224        1723        923     527  TCI, IR
 13188        1606        100      27  TRIOLAN, UA
  8452        1488       1852      16  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       11801       3382     595  UNINET, MX
 10620        3542        506     852  Telmex Colombia S.A., CO
 13999        2407        331     621  Mega Cable, S.A. de C.V., MX
 11830        1820        369      64  Instituto Costarricense de Electricidad
 28573        1327       2324     233  Claro NXT Telecomunicacoes Ltda, BR
  6503        1302        344     510  Axtel, S.A.B. de C.V., MX
  3816        1296        766     190  COLOMBIA TELECOMUNICACIONES S.A. ESP, C
  6147        1110        369      22  Telefonica del Peru S.A.A., PE
 11664        1106        179     428  Techtel LMDS Comunicaciones Interactiva
 26615        1034       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        1605        393      19  LINKdotNET-AS, EG
 24835        1549        549      28  RAYA-AS, EG
 36992        1360       1518     280  ETISALAT-MISR, EG
 36903        1242        550      99  MT-MPLS, MA
 29571        1046         67      45  ORANGE-COTE-IVOIRE, CI
 36935         938        521      44  Vodafone-, EG
  6713         549       1861      34  IAM-AS, MA
 15399         533         55      50  WANANCHI-, KE
 37342         489         32       1  MOVITEL, MZ
 24757         462         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       11801       3382     595  UNINET, MX
  9808        9495       8730      44  CHINAMOBILE-CN China Mobile Communicati
 16509        9098      10992    3232  AMAZON-02, US
 12479        7389       1713     145  UNI2-AS, ES
  7545        5735        785     698  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4938       4192      75  ERX-CERNET-BKB China Education and Rese
 39891        4897        290      61  ALJAWWALSTC-AS, SA
 11492        4535        301     668  CABLEONE, US
 18403        4231        347      25  FPT-AS-AP FPT Telecom Company, VN
  7155        4177        288     100  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        9495         9451  CHINAMOBILE-CN China Mobile Communications Grou
 12479        7389         7244  UNI2-AS, ES
 16509        9098         5866  AMAZON-02, US
  7545        5735         5037  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4938         4863  ERX-CERNET-BKB China Education and Research Net
 39891        4897         4836  ALJAWWALSTC-AS, SA
 18403        4231         4206  FPT-AS-AP FPT Telecom Company, VN
  7155        4177         4077  VIASAT-SP-BACKBONE, US
 20940        4073         3920  AKAMAI-ASN1, NL
 11492        4535         3867  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
23.176.160.0/24      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      /11:101     /12:299     
/13:581     /14:1196    /15:2064    /16:13501   /17:8313    /18:13886   
/19:25168   /20:44315   /21:51237   /22:110289  /23:99053   /24:559476  
/25:734     /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        6476        7389  UNI2-AS, ES
  8151        5830       11801  UNINET, MX
 39891        3632        4897  ALJAWWALSTC-AS, SA
 11492        3447        4535  CABLEONE, US
  6327        3356        3546  SHAW, CA
  7155        3122        4177  VIASAT-SP-BACKBONE, US
  8551        2923        3446  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
 22773        2578        3529  ASN-CXA-ALL-CCI-22773-RDC, US
 30036        2155        2498  MEDIACOM-ENTERPRISE-BUSINESS, US
 10620        2107        3542  Telmex Colombia S.A., CO

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

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

   1:2237      2:1408      3:265       4:5         5:4436      6:137    
   7:6         8:1538      9:1        11:172      12:1514     13:369    
  14:2328     15:304      16:200      17:369      18:659      20:287    
  21:4        22:188      23:6432     24:2511     25:2        27:2531   
  29:19       31:2535     32:78       34:25       35:117      36:2007   
  37:4520     38:5367     39:864      40:143      41:4016     42:2067   
  43:2295     44:321      45:16644    46:4296     47:369      49:1835   
  50:1884     51:590      52:1592     54:393      55:960      56:5      
  57:122      58:1866     59:1180     60:1004     61:2517     62:2690   
  63:1914     64:5647     65:2361     66:4990     67:3038     68:1340   
  69:4135     70:1194     71:668      72:2944     74:2626     75:1560   
  76:626      77:2302     78:1826     79:2985     80:2098     81:1832   
  82:1503     83:1302     84:1560     85:3075     86:770      87:2004   
  88:1201     89:3912     90:620      91:7813     92:2062     93:2617   
  94:3515     95:4020     96:1300     97:315      98:1082     99:730    
 100:90      101:1047    102:2860    103:32150   104:4739    105:576    
 106:915     107:2694    108:1132    109:4245    110:2134    111:3200   
 112:2067    113:1817    114:1693    115:1987    116:1901    117:2460   
 118:2685    119:1969    120:1803    121:1182    122:2610    123:2215   
 124:1614    125:2576    128:1450    129:922     130:1044    131:1977   
 132:820     133:408     134:1784    135:306     136:971     137:970    
 138:2620    139:1596    140:1286    141:1325    142:1513    143:1549   
 144:1009    145:353     146:1951    147:1608    148:2480    149:2281   
 150:877     151:1229    152:1873    153:520     154:5067    155:1389   
 156:1987    157:1336    158:1055    159:2247    160:2631    161:1594   
 162:3544    163:1608    164:1701    165:1845    166:1070    167:1734   
 168:3761    169:885     170:4634    171:914     172:3774    173:2966   
 174:983     175:1193    176:3788    177:4467    178:3537    179:2163   
 180:2459    181:3528    182:3409    183:1980    184:2275    185:20579  
 186:4678    187:4181    188:4165    189:3859    190:9281    191:1371   
 192:10986   193:8964    194:7308    195:5224    196:3096    197:2477   
 198:6024    199:6144    200:7861    201:5890    202:10557   203:10031  
 204:4557    205:3701    206:4381    207:3504    208:4153    209:4913   
 210:4498    211:2540    212:4258    213:3391    214:1114    215:70     
 216:6707    217:2781    218:1302    219:577     220:2032    221:982    
 222:842     223:2179   

End of report


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