[SANOG] Weekly Global IPv4 Routing Table Report

Routing Table Analysis Role Account cscora at apnic.net
Fri Oct 13 18:02:08 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 14 Oct, 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:                              932715
    Prefixes after maximum aggregation (per Origin AS):          354045
    Deaggregation factor:                                          2.63
    Unique aggregates announced (without unneeded subnets):      453796
Total ASes present in the Internet Routing Table:                 74910
    Prefixes per ASN:                                             12.45
Origin-only ASes present in the Internet Routing Table:           64286
Origin ASes announcing only one prefix:                           26511
Transit ASes present in the Internet Routing Table:               10624
Transit-only ASes present in the Internet Routing Table:            457
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:               991
    Number of instances of unregistered ASNs:                       994
Number of 32-bit ASNs allocated by the RIRs:                      42829
Number of 32-bit ASNs visible in the Routing Table:               35227
Prefixes from 32-bit ASNs in the Routing Table:                  176097
Number of bogon 32-bit ASNs visible in the Routing Table:            33
Special use prefixes present in the Routing Table:                    1
Prefixes being announced from unallocated address space:            522
Number of addresses announced to Internet:                   3052395776
    Equivalent to 181 /8s, 239 /16s and 221 /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:               99.5
Total number of prefixes smaller than registry allocations:      310528

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

Prefixes being announced by APNIC Region ASes:                   247475
    Total APNIC prefixes after maximum aggregation:               71042
    APNIC Deaggregation factor:                                    3.48
Prefixes being announced from the APNIC address blocks:          240913
    Unique aggregates announced from the APNIC address blocks:    98990
APNIC Region origin ASes present in the Internet Routing Table:   13684
    APNIC Prefixes per ASN:                                       17.61
APNIC Region origin ASes announcing only one prefix:               4120
APNIC Region transit ASes present in the Internet Routing Table:   1815
Average APNIC Region AS path length visible:                        4.4
    Max APNIC Region AS path length visible:                         24
Number of APNIC region 32-bit ASNs visible in the Routing Table:   9008
Number of APNIC addresses announced to Internet:              771669632
    Equivalent to 45 /8s, 254 /16s and 190 /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:                    273641
    Total ARIN prefixes after maximum aggregation:               123850
    ARIN Deaggregation factor:                                     2.21
Prefixes being announced from the ARIN address blocks:           277405
    Unique aggregates announced from the ARIN address blocks:    132133
ARIN Region origin ASes present in the Internet Routing Table:    19099
    ARIN Prefixes per ASN:                                        14.52
ARIN Region origin ASes announcing only one prefix:                6960
ARIN Region transit ASes present in the Internet Routing Table:    1975
Average ARIN Region AS path length visible:                         3.7
    Max ARIN Region AS path length visible:                          24
Number of ARIN region 32-bit ASNs visible in the Routing Table:    4827
Number of ARIN addresses announced to Internet:              1277746944
    Equivalent to 76 /8s, 40 /16s and 223 /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:                    262125
    Total RIPE prefixes after maximum aggregation:               123998
    RIPE Deaggregation factor:                                     2.11
Prefixes being announced from the RIPE address blocks:           257257
    Unique aggregates announced from the RIPE address blocks:    160279
RIPE Region origin ASes present in the Internet Routing Table:    28435
    RIPE Prefixes per ASN:                                         9.05
RIPE Region origin ASes announcing only one prefix:               12092
RIPE Region transit ASes present in the Internet Routing Table:    3939
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:   11378
Number of RIPE addresses announced to Internet:               716376960
    Equivalent to 42 /8s, 179 /16s and 11 /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:                  118565
    Total LACNIC prefixes after maximum aggregation:              28505
    LACNIC Deaggregation factor:                                   4.16
Prefixes being announced from the LACNIC address blocks:         117504
    Unique aggregates announced from the LACNIC address blocks:   49263
LACNIC Region origin ASes present in the Internet Routing Table:  11051
    LACNIC Prefixes per ASN:                                      10.63
LACNIC Region origin ASes announcing only one prefix:              2712
LACNIC Region transit ASes present in the Internet Routing Table:  2344
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:  8876
Number of LACNIC addresses announced to Internet:             178466816
    Equivalent to 10 /8s, 163 /16s and 48 /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:                  29918
    Total AfriNIC prefixes after maximum aggregation:              5954
    AfriNIC Deaggregation factor:                                  5.02
Prefixes being announced from the AfriNIC address blocks:         39114
    Unique aggregates announced from the AfriNIC address blocks:  12702
AfriNIC Region origin ASes present in the Internet Routing Table:  1795
    AfriNIC Prefixes per ASN:                                     21.79
AfriNIC Region origin ASes announcing only one prefix:              627
AfriNIC Region transit ASes present in the Internet Routing Table:  342
Average AfriNIC Region AS path length visible:                      4.9
    Max AfriNIC Region AS path length visible:                       31
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 1138
Number of AfriNIC addresses announced to Internet:            107696384
    Equivalent to 6 /8s, 107 /16s and 81 /24s
AfriNIC AS Blocks      36864-37887, 327680-329727 & ERX transfers
AfriNIC Address Blocks  41/8,  45/8, 102/8, 105/8, 154/8, 196/8, 197/8,
                      

APNIC Region per AS prefix count summary
----------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
  9808        9498       8730      43  CHINAMOBILE-CN China Mobile Communicati
  7545        5714        785     698  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4941       4192      75  ERX-CERNET-BKB China Education and Rese
 18403        4210        347      25  FPT-AS-AP FPT Telecom Company, VN
  7713        3596       1043      63  TELKOMNET-AS-AP PT Telekomunikasi Indon
 45899        3327       1840      96  VNPT-AS-VN VNPT Corp, VN
  9498        3211        495     249  BBIL-AP BHARTI Airtel Ltd., IN
  7552        2944       1330      20  VIETEL-AS-AP Viettel Group, VN
 24560        2545        850     381  AIRTELBROADBAND-AS-AP Bharti Airtel Ltd
  4766        2540      11270     601  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        9188      11009    3251  AMAZON-02, US
 11492        4538        301     671  CABLEONE, US
  7155        4172        288     100  VIASAT-SP-BACKBONE, US
  6327        3546       1319      66  SHAW, CA
 22773        3525       3055     300  ASN-CXA-ALL-CCI-22773-RDC, US
   749        3161      54958    2413  DNIC-AS-00749, US
   367        3077       3857    1441  DNIC-ASBLK-00306-00371, US
 16625        3007       1399    2296  AKAMAI-AS, US
396982        2701       3597     397  GOOGLE-CLOUD-PLATFORM, US
  7018        2507      23615    1569  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        7397       1713     145  UNI2-AS, ES
 39891        4897        290      61  ALJAWWALSTC-AS, SA
 20940        4093       3398     153  AKAMAI-ASN1, NL
  8551        3448        368      34  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
  9009        3077        275    1502  M247, RO
 12389        2970       2295     915  ROSTELECOM-AS, RU
 34984        2334        362     594  TELLCOM-AS, TR
 58224        1714        922     546  TCI, IR
 13188        1606        100      27  TRIOLAN, UA
  8452        1521       1852      15  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       11852       3378     601  UNINET, MX
 10620        3538        504     860  Telmex Colombia S.A., CO
 13999        2414        332     626  Mega Cable, S.A. de C.V., MX
 11830        2004        369      64  Instituto Costarricense de Electricidad
 28573        1333       2324     232  Claro NXT Telecomunicacoes Ltda, BR
  3816        1297        770     196  COLOMBIA TELECOMUNICACIONES S.A. ESP, C
  6503        1295        344     508  Axtel, S.A.B. de C.V., MX
  6147        1111        369      22  Telefonica del Peru S.A.A., PE
 11664        1054        168     425  Techtel LMDS Comunicaciones Interactiva
 26615        1039       2501      51  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        1606        393      19  LINKdotNET-AS, EG
 24835        1549        549      28  RAYA-AS, EG
 36992        1358       1518     280  ETISALAT-MISR, EG
 36903        1248        553      98  MT-MPLS, MA
 29571        1044         67      45  ORANGE-COTE-IVOIRE, CI
 36935         938        521      44  Vodafone-, EG
  6713         551       1861      34  IAM-AS, MA
 15399         535         55      51  WANANCHI-, KE
 37342         489         32       1  MOVITEL, MZ
 24757         479         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       11852       3378     601  UNINET, MX
  9808        9498       8730      43  CHINAMOBILE-CN China Mobile Communicati
 16509        9188      11009    3251  AMAZON-02, US
 12479        7397       1713     145  UNI2-AS, ES
  7545        5714        785     698  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4941       4192      75  ERX-CERNET-BKB China Education and Rese
 39891        4897        290      61  ALJAWWALSTC-AS, SA
 11492        4538        301     671  CABLEONE, US
 18403        4210        347      25  FPT-AS-AP FPT Telecom Company, VN
  7155        4172        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        9498         9455  CHINAMOBILE-CN China Mobile Communications Grou
 12479        7397         7252  UNI2-AS, ES
 16509        9188         5937  AMAZON-02, US
  7545        5714         5016  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4941         4866  ERX-CERNET-BKB China Education and Research Net
 39891        4897         4836  ALJAWWALSTC-AS, SA
 18403        4210         4185  FPT-AS-AP FPT Telecom Company, VN
  7155        4172         4072  VIASAT-SP-BACKBONE, US
 20940        4093         3940  AKAMAI-ASN1, NL
 11492        4538         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     /14:1193    /15:2060    /16:13486   /17:8319    /18:13869   
/19:25191   /20:44498   /21:51626   /22:110461  /23:99321   /24:560903  
/25:739     /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        6483        7397  UNI2-AS, ES
  8151        5883       11852  UNINET, MX
 39891        3632        4897  ALJAWWALSTC-AS, SA
 11492        3451        4538  CABLEONE, US
  6327        3356        3546  SHAW, CA
  7155        3117        4172  VIASAT-SP-BACKBONE, US
  8551        2925        3448  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
 22773        2578        3525  ASN-CXA-ALL-CCI-22773-RDC, US
 30036        2157        2501  MEDIACOM-ENTERPRISE-BUSINESS, US
 10620        2112        3538  Telmex Colombia S.A., CO

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

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

   1:2244      2:1441      3:266       4:5         5:4367      6:137    
   7:6         8:1536      9:1        11:172      12:1500     13:376    
  14:2317     15:303      16:200      17:367      18:661      20:305    
  21:4        22:188      23:6462     24:2526     25:2        27:2528   
  29:19       31:2545     32:78       34:26       35:117      36:1995   
  37:4544     38:5423     39:865      40:143      41:4006     42:2033   
  43:2307     44:324      45:16660    46:4306     47:371      49:1845   
  50:1891     51:583      52:1595     54:394      55:950      56:5      
  57:127      58:1858     59:1180     60:1005     61:2521     62:2681   
  63:1915     64:5656     65:2347     66:5005     67:3040     68:1346   
  69:4136     70:1188     71:639      72:2946     74:2627     75:1566   
  76:636      77:2299     78:1827     79:3002     80:2091     81:1829   
  82:1530     83:1311     84:1576     85:3072     86:757      87:2013   
  88:1209     89:3931     90:624      91:7858     92:2064     93:2633   
  94:3554     95:4076     96:1301     97:316      98:1084     99:735    
 100:91      101:1053    102:2871    103:32162   104:4744    105:578    
 106:918     107:2723    108:1143    109:4244    110:2140    111:3192   
 112:2061    113:1817    114:1701    115:1982    116:1919    117:2471   
 118:2698    119:1972    120:1808    121:1203    122:2620    123:2221   
 124:1624    125:2598    128:1458    129:925     130:1047    131:1970   
 132:824     133:408     134:1782    135:304     136:909     137:977    
 138:2662    139:1607    140:1304    141:1324    142:1524    143:1527   
 144:1013    145:348     146:1962    147:1615    148:2468    149:2336   
 150:879     151:1234    152:1847    153:524     154:5129    155:1394   
 156:2013    157:1346    158:1053    159:2200    160:2638    161:1595   
 162:3523    163:1621    164:1715    165:1837    166:1077    167:1741   
 168:3843    169:797     170:4614    171:947     172:3793    173:2982   
 174:987     175:1183    176:3790    177:4477    178:3563    179:2145   
 180:2462    181:3516    182:3416    183:1976    184:2278    185:20627  
 186:4674    187:4171    188:4163    189:3885    190:9308    191:1380   
 192:10970   193:8966    194:7299    195:5231    196:3116    197:2484   
 198:6023    199:6253    200:8018    201:6164    202:10575   203:10022  
 204:4547    205:3705    206:4391    207:3515    208:4131    209:4931   
 210:4496    211:2541    212:4277    213:3398    214:1114    215:70     
 216:6727    217:2774    218:1305    219:579     220:2033    221:984    
 222:843     223:2180   

End of report


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