[SANOG] Weekly Global IPv4 Routing Table Report

Routing Table Analysis Role Account cscora at apnic.net
Fri Mar 10 18:03:35 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
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 11 Mar, 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:                              915007
    Prefixes after maximum aggregation (per Origin AS):          347222
    Deaggregation factor:                                          2.64
    Unique aggregates announced (without unneeded subnets):      446319
Total ASes present in the Internet Routing Table:                 74206
    Prefixes per ASN:                                             12.33
Origin-only ASes present in the Internet Routing Table:           63674
Origin ASes announcing only one prefix:                           26136
Transit ASes present in the Internet Routing Table:               10532
Transit-only ASes present in the Internet Routing Table:            450
Average AS path length visible in the Internet Routing Table:       4.3
    Max AS path length visible:                                      55
    Max AS path prepend of ASN (265020)                              50
Prefixes from unregistered ASNs in the Routing Table:              1094
    Number of instances of unregistered ASNs:                      1110
Number of 32-bit ASNs allocated by the RIRs:                      41406
Number of 32-bit ASNs visible in the Routing Table:               34306
Prefixes from 32-bit ASNs in the Routing Table:                  168053
Number of bogon 32-bit ASNs visible in the Routing Table:            49
Special use prefixes present in the Routing Table:                    1
Prefixes being announced from unallocated address space:            540
Number of addresses announced to Internet:                   3063655424
    Equivalent to 182 /8s, 155 /16s and 172 /24s
    Percentage of available address space announced:               82.8
    Percentage of allocated address space announced:               82.8
    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:      306150

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

Prefixes being announced by APNIC Region ASes:                   241976
    Total APNIC prefixes after maximum aggregation:               69078
    APNIC Deaggregation factor:                                    3.50
Prefixes being announced from the APNIC address blocks:          236589
    Unique aggregates announced from the APNIC address blocks:    97821
APNIC Region origin ASes present in the Internet Routing Table:   13346
    APNIC Prefixes per ASN:                                       17.73
APNIC Region origin ASes announcing only one prefix:               3893
APNIC Region transit ASes present in the Internet Routing Table:   1790
Average APNIC Region AS path length visible:                        4.5
    Max APNIC Region AS path length visible:                         26
Number of APNIC region 32-bit ASNs visible in the Routing Table:   8624
Number of APNIC addresses announced to Internet:              773734784
    Equivalent to 46 /8s, 30 /16s and 65 /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, 131072-151865
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:                    267839
    Total ARIN prefixes after maximum aggregation:               121700
    ARIN Deaggregation factor:                                     2.20
Prefixes being announced from the ARIN address blocks:           269935
    Unique aggregates announced from the ARIN address blocks:    130374
ARIN Region origin ASes present in the Internet Routing Table:    19066
    ARIN Prefixes per ASN:                                        14.16
ARIN Region origin ASes announcing only one prefix:                6969
ARIN Region transit ASes present in the Internet Routing Table:    1958
Average ARIN Region AS path length visible:                         3.7
    Max ARIN Region AS path length visible:                          36
Number of ARIN region 32-bit ASNs visible in the Routing Table:    4755
Number of ARIN addresses announced to Internet:              1286731520
    Equivalent to 76 /8s, 177 /16s and 247 /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:                    257352
    Total RIPE prefixes after maximum aggregation:               121375
    RIPE Deaggregation factor:                                     2.12
Prefixes being announced from the RIPE address blocks:           253836
    Unique aggregates announced from the RIPE address blocks:    156754
RIPE Region origin ASes present in the Internet Routing Table:    28239
    RIPE Prefixes per ASN:                                         8.99
RIPE Region origin ASes announcing only one prefix:               12007
RIPE Region transit ASes present in the Internet Routing Table:    3949
Average RIPE Region AS path length visible:                         4.3
    Max RIPE Region AS path length visible:                          38
Number of RIPE region 32-bit ASNs visible in the Routing Table:   11073
Number of RIPE addresses announced to Internet:               718252672
    Equivalent to 42 /8s, 207 /16s and 170 /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
                       196608-213403
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:                  117404
    Total LACNIC prefixes after maximum aggregation:              28499
    LACNIC Deaggregation factor:                                   4.12
Prefixes being announced from the LACNIC address blocks:         116794
    Unique aggregates announced from the LACNIC address blocks:   48887
LACNIC Region origin ASes present in the Internet Routing Table:  10986
    LACNIC Prefixes per ASN:                                      10.63
LACNIC Region origin ASes announcing only one prefix:              2672
LACNIC Region transit ASes present in the Internet Routing Table:  2278
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:  8784
Number of LACNIC addresses announced to Internet:             176436224
    Equivalent to 10 /8s, 132 /16s and 52 /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:                  29342
    Total AfriNIC prefixes after maximum aggregation:              5781
    AfriNIC Deaggregation factor:                                  5.08
Prefixes being announced from the AfriNIC address blocks:         37313
    Unique aggregates announced from the AfriNIC address blocks:  12056
AfriNIC Region origin ASes present in the Internet Routing Table:  1724
    AfriNIC Prefixes per ASN:                                     21.64
AfriNIC Region origin ASes announcing only one prefix:              595
AfriNIC Region transit ASes present in the Internet Routing Table:  337
Average AfriNIC Region AS path length visible:                      4.9
    Max AfriNIC Region AS path length visible:                       30
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 1070
Number of AfriNIC addresses announced to Internet:            108099840
    Equivalent to 6 /8s, 113 /16s and 121 /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        9462       8884      51  CHINAMOBILE-CN China Mobile Communicati
  7545        5770        786     691  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4862       4192      75  ERX-CERNET-BKB China Education and Rese
  7552        3675       1331      21  VIETEL-AS-AP Viettel Group, VN
  7713        3533       1043      65  TELKOMNET-AS-AP PT Telekomunikasi Indon
 45899        3368       1874      95  VNPT-AS-VN VNPT Corp, VN
  9498        2818        499     238  BBIL-AP BHARTI Airtel Ltd., IN
  4766        2551      11251     591  KIXS-AS-KR Korea Telecom, KR
 24560        2359        834     441  AIRTELBROADBAND-AS-AP Bharti Airtel Ltd
 45090        2184       1438      79  TENCENT-NET-AP Shenzhen Tencent Compute

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        8051      10754    2882  AMAZON-02, US
 11492        4529        300     616  CABLEONE, US
  7155        3959        270      44  VIASAT-SP-BACKBONE, US
 22773        3650       3064     297  ASN-CXA-ALL-CCI-22773-RDC, US
  6327        3505       1320      64  SHAW, CA
 16625        3190       1601    2359  AKAMAI-AS, US
   749        3037      50520    2304  DNIC-AS-00749, US
396982        2622       3586     356  GOOGLE-CLOUD-PLATFORM, US
  7018        2559      24119    1565  ATT-INTERNET4, US
 30036        2521        362     445  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        7064       1705     149  UNI2-AS, ES
 39891        4561        269      58  ALJAWWALSTC-AS, SA
 20940        4039       3399     171  AKAMAI-ASN1, NL
  8551        3895        370      37  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
 12389        2950       2292     911  ROSTELECOM-AS, RU
  9009        2638        250    1382  M247, RO
 34984        2266        359     609  TELLCOM-AS, TR
  6849        2163        339      19  UKRTELNET, UA
 58224        1847        949     546  TCI, IR
 13188        1607        100      27  TRIOLAN, UA

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       11136       3329     593  Uninet S.A. de C.V., MX
 10620        3466        504     879  Telmex Colombia S.A., CO
 13999        2281        372     608  Mega Cable, S.A. de C.V., MX
 11830        2264        369      64  Instituto Costarricense de Electricidad
 28573        1365       2325     254  Claro NXT Telecomunicacoes Ltda, BR
  3816        1301        763     161  COLOMBIA TELECOMUNICACIONES S.A. ESP, C
  6503        1298        339     513  Axtel, S.A.B. de C.V., MX
  6147        1130        370      22  Telefonica del Peru S.A.A., PE
 11664        1097        180     461  Techtel LMDS Comunicaciones Interactiva
 26615        1029       2498      45  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        1556        393      19  LINKdotNET-AS, EG
 24835        1542        533      30  RAYA-AS, EG
 36992        1343       1518     275  ETISALAT-MISR, EG
 36903        1242        550      99  MT-MPLS, MA
 29571        1013         67      53  ORANGE-COTE-IVOIRE, CI
 36935         868        520      42  Vodafone-, EG
  6713         550       1861      34  IAM-AS, MA
 15399         528         54      47  WANANCHI-, KE
 24757         496         73       5  EthioNet-AS, ET
 37342         493         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       11136       3329     593  Uninet S.A. de C.V., MX
  9808        9462       8884      51  CHINAMOBILE-CN China Mobile Communicati
 16509        8051      10754    2882  AMAZON-02, US
 12479        7064       1705     149  UNI2-AS, ES
  7545        5770        786     691  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4862       4192      75  ERX-CERNET-BKB China Education and Rese
 39891        4561        269      58  ALJAWWALSTC-AS, SA
 11492        4529        300     616  CABLEONE, US
 20940        4039       3399     171  AKAMAI-ASN1, NL
  7155        3959        270      44  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        9462         9411  CHINAMOBILE-CN China Mobile Communications Grou
 12479        7064         6915  UNI2-AS, ES
 16509        8051         5169  AMAZON-02, US
  7545        5770         5079  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4862         4787  ERX-CERNET-BKB China Education and Research Net
 39891        4561         4503  ALJAWWALSTC-AS, SA
  7155        3959         3915  VIASAT-SP-BACKBONE, US
 11492        4529         3913  CABLEONE, US
 20940        4039         3868  AKAMAI-ASN1, NL
  8551        3895         3858  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo

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
     33123  UNALLOCATED  8.10.69.0/24             11168  SCC, US
     12169  UNALLOCATED  8.15.207.0/24            32787  PROLEXIC-TECHNOLOGIES-DDOS-M
     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
     18798  UNALLOCATED  8.40.106.0/24             6461  ZAYO-6461, US
    394856  UNALLOCATED  8.40.216.0/24             3356  LEVEL3, 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
23.131.185.0/24      Origin:       174  COGENT-174, US
23.131.185.0/24     Transit:      2516  KDDI KDDI CORPORATION, JP
23.131.186.0/24      Origin:       174  COGENT-174, US
23.131.186.0/24     Transit:      2516  KDDI KDDI CORPORATION, JP
23.131.187.0/24      Origin:       174  COGENT-174, US
23.131.187.0/24     Transit:      2516  KDDI KDDI CORPORATION, JP
23.131.188.0/24      Origin:       174  COGENT-174, US
23.131.188.0/24     Transit:      2516  KDDI KDDI CORPORATION, JP
23.136.112.0/24      Origin:     54835  UNASSIGNED
23.136.112.0/24     Transit:     21559  OSNET, PR

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       /9:13      /10:39      /11:103     /12:299     
/13:579     /14:1201    /15:2041    /16:13485   /17:8277    /18:13832   
/19:25209   /20:44307   /21:51700   /22:109721  /23:97586   /24:545777  
/25:822     /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        6122        7064  UNI2-AS, ES
  8151        5125       11136  Uninet S.A. de C.V., MX
 39891        3552        4561  ALJAWWALSTC-AS, SA
 11492        3437        4529  CABLEONE, US
  8551        3367        3895  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
  6327        3313        3505  SHAW, CA
  7155        3036        3959  VIASAT-SP-BACKBONE, US
 22773        2697        3650  ASN-CXA-ALL-CCI-22773-RDC, US
 30036        2178        2521  MEDIACOM-ENTERPRISE-BUSINESS, US
 10620        2020        3466  Telmex Colombia S.A., CO

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

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

   1:1700      2:1231      3:168       4:5         5:4343      6:118    
   7:6         8:1554      9:1        11:172      12:1579     13:391    
  14:2327     15:293      16:111      17:369      18:398      20:249    
  21:4        22:188      23:6131     24:2494     25:4        27:2502   
  29:19       31:2505     32:110      34:8        35:106      36:1913   
  37:4621     38:4349     39:806      40:151      41:4016     42:949    
  43:2335     44:308      45:16413    46:4187     47:382      49:1749   
  50:1834     51:378      52:1588     54:389      55:869      56:8      
  57:89       58:1741     59:1126     60:974      61:2435     62:2641   
  63:1937     64:5652     65:2324     66:4934     67:3002     68:1354   
  69:4133     70:1269     71:665      72:2974     74:2598     75:1459   
  76:605      77:2423     78:1853     79:3168     80:2058     81:1738   
  82:1509     83:1234     84:1528     85:3009     86:756      87:1954   
  88:1243     89:3595     90:611      91:7650     92:2014     93:2575   
  94:3542     95:3956     96:1326     97:331      98:1161     99:747    
 100:77      101:1062    102:2644    103:31031   104:4591    105:483    
 106:911     107:2546    108:937     109:4395    110:2071    111:3289   
 112:2046    113:1558    114:1625    115:2042    116:1929    117:2563   
 118:2274    119:1970    120:1772    121:1115    122:2598    123:2184   
 124:1617    125:2455    128:1316    129:1074    130:1001    131:2006   
 132:793     133:421     134:1906    135:299     136:867     137:933    
 138:2541    139:1555    140:1195    141:1471    142:1432    143:1475   
 144:1209    145:356     146:1911    147:1565    148:2309    149:1929   
 150:876     151:1142    152:1848    153:486     154:4248    155:1424   
 156:1679    157:1285    158:1052    159:2267    160:2550    161:1446   
 162:3539    163:1500    164:1594    165:1681    166:860     167:1721   
 168:3825    169:931     170:4582    171:900     172:3505    173:2950   
 174:1017    175:1162    176:3737    177:4583    178:3626    179:2185   
 180:2363    181:3413    182:3350    183:1935    184:2334    185:20121  
 186:4692    187:3936    188:4134    189:3581    190:9137    191:1481   
 192:10959   193:8830    194:7243    195:5134    196:3076    197:2389   
 198:5967    199:6098    200:7766    201:5854    202:10734   203:10191  
 204:4604    205:3535    206:3844    207:3453    208:4083    209:4873   
 210:4454    211:2499    212:4100    213:3548    214:1094    215:58     
 216:6602    217:2659    218:1288    219:580     220:2015    221:972    
 222:876     223:2148   

End of report


More information about the sanog mailing list