[SANOG] Weekly Global IPv4 Routing Table Report

Routing Table Analysis Role Account cscora at apnic.net
Fri Oct 20 18:02:16 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 21 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:                              933249
    Prefixes after maximum aggregation (per Origin AS):          354499
    Deaggregation factor:                                          2.63
    Unique aggregates announced (without unneeded subnets):      453979
Total ASes present in the Internet Routing Table:                 74961
    Prefixes per ASN:                                             12.45
Origin-only ASes present in the Internet Routing Table:           64309
Origin ASes announcing only one prefix:                           26493
Transit ASes present in the Internet Routing Table:               10652
Transit-only ASes present in the Internet Routing Table:            466
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:              1050
    Number of instances of unregistered ASNs:                      1053
Number of 32-bit ASNs allocated by the RIRs:                      42880
Number of 32-bit ASNs visible in the Routing Table:               35270
Prefixes from 32-bit ASNs in the Routing Table:                  176608
Number of bogon 32-bit ASNs visible in the Routing Table:            25
Special use prefixes present in the Routing Table:                    1
Prefixes being announced from unallocated address space:            527
Number of addresses announced to Internet:                   3050844928
    Equivalent to 181 /8s, 216 /16s and 51 /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:      310313

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

Prefixes being announced by APNIC Region ASes:                   247818
    Total APNIC prefixes after maximum aggregation:               71198
    APNIC Deaggregation factor:                                    3.48
Prefixes being announced from the APNIC address blocks:          241168
    Unique aggregates announced from the APNIC address blocks:    99178
APNIC Region origin ASes present in the Internet Routing Table:   13716
    APNIC Prefixes per ASN:                                       17.58
APNIC Region origin ASes announcing only one prefix:               4119
APNIC Region transit ASes present in the Internet Routing Table:   1823
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:   9041
Number of APNIC addresses announced to Internet:              771026304
    Equivalent to 45 /8s, 244 /16s and 237 /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:                    273822
    Total ARIN prefixes after maximum aggregation:               124061
    ARIN Deaggregation factor:                                     2.21
Prefixes being announced from the ARIN address blocks:           277696
    Unique aggregates announced from the ARIN address blocks:    132182
ARIN Region origin ASes present in the Internet Routing Table:    19078
    ARIN Prefixes per ASN:                                        14.56
ARIN Region origin ASes announcing only one prefix:                6954
ARIN Region transit ASes present in the Internet Routing Table:    1971
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:    4822
Number of ARIN addresses announced to Internet:              1277548800
    Equivalent to 76 /8s, 37 /16s and 217 /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:                    261666
    Total RIPE prefixes after maximum aggregation:               124024
    RIPE Deaggregation factor:                                     2.11
Prefixes being announced from the RIPE address blocks:           256866
    Unique aggregates announced from the RIPE address blocks:    160285
RIPE Region origin ASes present in the Internet Routing Table:    28450
    RIPE Prefixes per ASN:                                         9.03
RIPE Region origin ASes announcing only one prefix:               12103
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:                          30
Number of RIPE region 32-bit ASNs visible in the Routing Table:   11387
Number of RIPE addresses announced to Internet:               716460672
    Equivalent to 42 /8s, 180 /16s and 82 /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:                  119000
    Total LACNIC prefixes after maximum aggregation:              28497
    LACNIC Deaggregation factor:                                   4.18
Prefixes being announced from the LACNIC address blocks:         117935
    Unique aggregates announced from the LACNIC address blocks:   49227
LACNIC Region origin ASes present in the Internet Routing Table:  11044
    LACNIC Prefixes per ASN:                                      10.68
LACNIC Region origin ASes announcing only one prefix:              2685
LACNIC Region transit ASes present in the Internet Routing Table:  2348
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:  8874
Number of LACNIC addresses announced to Internet:             178350848
    Equivalent to 10 /8s, 161 /16s and 107 /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:                  29893
    Total AfriNIC prefixes after maximum aggregation:              5995
    AfriNIC Deaggregation factor:                                  4.99
Prefixes being announced from the AfriNIC address blocks:         39057
    Unique aggregates announced from the AfriNIC address blocks:  12670
AfriNIC Region origin ASes present in the Internet Routing Table:  1805
    AfriNIC Prefixes per ASN:                                     21.64
AfriNIC Region origin ASes announcing only one prefix:              632
AfriNIC Region transit ASes present in the Internet Routing Table:  347
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: 1146
Number of AfriNIC addresses announced to Internet:            107034112
    Equivalent to 6 /8s, 97 /16s and 54 /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        9497       8730      43  CHINAMOBILE-CN China Mobile Communicati
  7545        5715        785     698  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4945       4192      75  ERX-CERNET-BKB China Education and Rese
 18403        4188        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        3214        492     240  BBIL-AP BHARTI Airtel Ltd., IN
  7552        2952       1330      20  VIETEL-AS-AP Viettel Group, VN
 24560        2553        849     378  AIRTELBROADBAND-AS-AP Bharti Airtel Ltd
  4766        2539      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        9145      11002    3277  AMAZON-02, US
 11492        4538        301     676  CABLEONE, US
  7155        4172        288     100  VIASAT-SP-BACKBONE, US
  6327        3547       1320      67  SHAW, CA
 22773        3520       3055     299  ASN-CXA-ALL-CCI-22773-RDC, US
   749        3160      54957    2412  DNIC-AS-00749, US
   367        3078       3849    1442  DNIC-ASBLK-00306-00371, US
 16625        3044       1405    2316  AKAMAI-AS, US
396982        2704       3598     397  GOOGLE-CLOUD-PLATFORM, US
  7018        2532      23613    1585  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        7394       1713     145  UNI2-AS, ES
 39891        4897        290      61  ALJAWWALSTC-AS, SA
 20940        4091       3397     148  AKAMAI-ASN1, NL
  8551        3449        368      34  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
  9009        3102        277    1525  M247, RO
 12389        2970       2295     914  ROSTELECOM-AS, RU
 34984        2332        362     592  TELLCOM-AS, TR
 58224        1701        920     523  TCI, IR
 13188        1606        100      27  TRIOLAN, UA
  8452        1522       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       11879       3372     605  UNINET, MX
 10620        3542        504     858  Telmex Colombia S.A., CO
 13999        2418        333     627  Mega Cable, S.A. de C.V., MX
 11830        2001        369      64  Instituto Costarricense de Electricidad
 28573        1332       2322     236  Claro NXT Telecomunicacoes Ltda, BR
  3816        1298        770     191  COLOMBIA TELECOMUNICACIONES S.A. ESP, C
  6503        1283        343     510  Axtel, S.A.B. de C.V., MX
  6147        1110        369      22  Telefonica del Peru S.A.A., PE
 11664        1054        168     425  Techtel LMDS Comunicaciones Interactiva
 26615        1040       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        1047         67      46  ORANGE-COTE-IVOIRE, CI
 36935         938        521      44  Vodafone-, EG
  6713         551       1861      34  IAM-AS, MA
 15399         537         55      51  WANANCHI-, KE
 24757         479         73       5  EthioNet-AS, ET
 37342         471         32       1  MOVITEL, MZ

Complete listing at https://thyme.apnic.net/current/data-ASnet-AFRINIC

Global Per AS prefix count summary
----------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
  8151       11879       3372     605  UNINET, MX
  9808        9497       8730      43  CHINAMOBILE-CN China Mobile Communicati
 16509        9145      11002    3277  AMAZON-02, US
 12479        7394       1713     145  UNI2-AS, ES
  7545        5715        785     698  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4945       4192      75  ERX-CERNET-BKB China Education and Rese
 39891        4897        290      61  ALJAWWALSTC-AS, SA
 11492        4538        301     676  CABLEONE, US
 18403        4188        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        9497         9454  CHINAMOBILE-CN China Mobile Communications Grou
 12479        7394         7249  UNI2-AS, ES
 16509        9145         5868  AMAZON-02, US
  7545        5715         5017  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4945         4870  ERX-CERNET-BKB China Education and Research Net
 39891        4897         4836  ALJAWWALSTC-AS, SA
 18403        4188         4163  FPT-AS-AP FPT Telecom Company, VN
  7155        4172         4072  VIASAT-SP-BACKBONE, US
 20940        4091         3943  AKAMAI-ASN1, NL
 11492        4538         3862  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      /11:100     /12:299     
/13:581     /14:1192    /15:2056    /16:13480   /17:8327    /18:13850   
/19:25154   /20:44444   /21:51607   /22:110531  /23:99457   /24:561369  
/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        6481        7394  UNI2-AS, ES
  8151        5916       11879  UNINET, MX
 39891        3632        4897  ALJAWWALSTC-AS, SA
 11492        3451        4538  CABLEONE, US
  6327        3356        3547  SHAW, CA
  7155        3117        4172  VIASAT-SP-BACKBONE, US
  8551        2926        3449  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
 22773        2575        3520  ASN-CXA-ALL-CCI-22773-RDC, US
 30036        2153        2498  MEDIACOM-ENTERPRISE-BUSINESS, US
 10620        2116        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)
----------------------------------------------

   1:2235      2:1443      3:269       4:5         5:4374      6:153    
   7:6         8:1536      9:1        11:172      12:1502     13:366    
  14:2320     15:305      16:200      17:364      18:663      20:308    
  21:4        22:188      23:6480     24:2532     25:2        27:2529   
  29:19       31:2548     32:75       34:26       35:117      36:2000   
  37:4486     38:5471     39:867      40:143      41:3963     42:2048   
  43:2305     44:325      45:16695    46:4344     47:370      49:1845   
  50:1895     51:578      52:1586     54:391      55:959      56:5      
  57:127      58:1861     59:1179     60:1005     61:2523     62:2699   
  63:1912     64:5638     65:2352     66:5001     67:3054     68:1346   
  69:4130     70:1190     71:639      72:2944     74:2636     75:1562   
  76:635      77:2307     78:1828     79:3008     80:2108     81:1830   
  82:1520     83:1305     84:1575     85:3063     86:767      87:2004   
  88:1203     89:3948     90:622      91:7850     92:2069     93:2642   
  94:3566     95:4003     96:1303     97:316      98:1083     99:736    
 100:92      101:1055    102:2884    103:32306   104:4792    105:577    
 106:924     107:2726    108:1135    109:4248    110:2141    111:3183   
 112:2064    113:1819    114:1700    115:1984    116:1920    117:2457   
 118:2689    119:1971    120:1811    121:1202    122:2617    123:2222   
 124:1620    125:2609    128:1470    129:916     130:1046    131:1963   
 132:819     133:408     134:1772    135:304     136:907     137:981    
 138:2662    139:1605    140:1306    141:1331    142:1516    143:1536   
 144:1008    145:348     146:1966    147:1618    148:2475    149:2346   
 150:882     151:1242    152:1846    153:524     154:5168    155:1402   
 156:2032    157:1352    158:1056    159:2196    160:2635    161:1601   
 162:3517    163:1624    164:1720    165:1848    166:1074    167:1742   
 168:3857    169:794     170:4615    171:946     172:3797    173:2997   
 174:981     175:1188    176:3622    177:4501    178:3543    179:2159   
 180:2467    181:3524    182:3424    183:1983    184:2271    185:20622  
 186:4708    187:4177    188:4097    189:3909    190:9321    191:1377   
 192:10970   193:8974    194:7314    195:5231    196:3134    197:2482   
 198:6033    199:6311    200:8067    201:6197    202:10574   203:10013  
 204:4551    205:3713    206:4391    207:3519    208:4127    209:4941   
 210:4497    211:2543    212:4273    213:3393    214:1112    215:71     
 216:6728    217:2775    218:1307    219:582     220:2034    221:985    
 222:844     223:2184   

End of report


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