[SANOG] Weekly Global IPv4 Routing Table Report

Routing Table Analysis Role Account cscora at apnic.net
Fri Mar 24 18:03:36 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 25 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:                              916706
    Prefixes after maximum aggregation (per Origin AS):          347952
    Deaggregation factor:                                          2.63
    Unique aggregates announced (without unneeded subnets):      447433
Total ASes present in the Internet Routing Table:                 74277
    Prefixes per ASN:                                             12.34
Origin-only ASes present in the Internet Routing Table:           63736
Origin ASes announcing only one prefix:                           26191
Transit ASes present in the Internet Routing Table:               10541
Transit-only ASes present in the Internet Routing Table:            437
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:              1062
    Number of instances of unregistered ASNs:                      1081
Number of 32-bit ASNs allocated by the RIRs:                      41520
Number of 32-bit ASNs visible in the Routing Table:               34390
Prefixes from 32-bit ASNs in the Routing Table:                  168886
Number of bogon 32-bit ASNs visible in the Routing Table:            64
Special use prefixes present in the Routing Table:                    1
Prefixes being announced from unallocated address space:            504
Number of addresses announced to Internet:                   3063124224
    Equivalent to 182 /8s, 147 /16s and 145 /24s
    Percentage of available address space announced:               82.7
    Percentage of allocated address space announced:               82.7
    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:      306925

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

Prefixes being announced by APNIC Region ASes:                   242068
    Total APNIC prefixes after maximum aggregation:               69187
    APNIC Deaggregation factor:                                    3.50
Prefixes being announced from the APNIC address blocks:          236645
    Unique aggregates announced from the APNIC address blocks:    98042
APNIC Region origin ASes present in the Internet Routing Table:   13391
    APNIC Prefixes per ASN:                                       17.67
APNIC Region origin ASes announcing only one prefix:               3931
APNIC Region transit ASes present in the Internet Routing Table:   1800
Average APNIC Region AS path length visible:                        4.5
    Max APNIC Region AS path length visible:                         38
Number of APNIC region 32-bit ASNs visible in the Routing Table:   8674
Number of APNIC addresses announced to Internet:              773729408
    Equivalent to 46 /8s, 30 /16s and 44 /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:                    268307
    Total ARIN prefixes after maximum aggregation:               122098
    ARIN Deaggregation factor:                                     2.20
Prefixes being announced from the ARIN address blocks:           270513
    Unique aggregates announced from the ARIN address blocks:    130377
ARIN Region origin ASes present in the Internet Routing Table:    19069
    ARIN Prefixes per ASN:                                        14.19
ARIN Region origin ASes announcing only one prefix:                6964
ARIN Region transit ASes present in the Internet Routing Table:    1967
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:    4765
Number of ARIN addresses announced to Internet:              1286019328
    Equivalent to 76 /8s, 167 /16s and 25 /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:                    258329
    Total RIPE prefixes after maximum aggregation:               121641
    RIPE Deaggregation factor:                                     2.12
Prefixes being announced from the RIPE address blocks:           254652
    Unique aggregates announced from the RIPE address blocks:    157366
RIPE Region origin ASes present in the Internet Routing Table:    28296
    RIPE Prefixes per ASN:                                         9.00
RIPE Region origin ASes announcing only one prefix:               12048
RIPE Region transit ASes present in the Internet Routing Table:    3961
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:   11111
Number of RIPE addresses announced to Internet:               718214272
    Equivalent to 42 /8s, 207 /16s and 20 /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:                  117659
    Total LACNIC prefixes after maximum aggregation:              28455
    LACNIC Deaggregation factor:                                   4.13
Prefixes being announced from the LACNIC address blocks:         116993
    Unique aggregates announced from the LACNIC address blocks:   49024
LACNIC Region origin ASes present in the Internet Routing Table:  10965
    LACNIC Prefixes per ASN:                                      10.67
LACNIC Region origin ASes announcing only one prefix:              2641
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:  8762
Number of LACNIC addresses announced to Internet:             176649984
    Equivalent to 10 /8s, 135 /16s and 119 /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:                  29281
    Total AfriNIC prefixes after maximum aggregation:              5801
    AfriNIC Deaggregation factor:                                  5.05
Prefixes being announced from the AfriNIC address blocks:         37399
    Unique aggregates announced from the AfriNIC address blocks:  12219
AfriNIC Region origin ASes present in the Internet Routing Table:  1735
    AfriNIC Prefixes per ASN:                                     21.56
AfriNIC Region origin ASes announcing only one prefix:              607
AfriNIC Region transit ASes present in the Internet Routing Table:  333
Average AfriNIC Region AS path length visible:                      4.9
    Max AfriNIC Region AS path length visible:                       37
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 1078
Number of AfriNIC addresses announced to Internet:            108126976
    Equivalent to 6 /8s, 113 /16s and 227 /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        9511       8884      51  CHINAMOBILE-CN China Mobile Communicati
  7545        5755        786     691  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4867       4192      75  ERX-CERNET-BKB China Education and Rese
  7713        3530       1043      65  TELKOMNET-AS-AP PT Telekomunikasi Indon
  7552        3454       1331      21  VIETEL-AS-AP Viettel Group, VN
 45899        3384       1874      95  VNPT-AS-VN VNPT Corp, VN
  9498        2853        491     237  BBIL-AP BHARTI Airtel Ltd., IN
  4766        2558      11252     593  KIXS-AS-KR Korea Telecom, KR
 24560        2361        837     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        8118      10764    2897  AMAZON-02, US
 11492        4534        300     620  CABLEONE, US
  7155        3962        279      45  VIASAT-SP-BACKBONE, US
 22773        3622       3062     292  ASN-CXA-ALL-CCI-22773-RDC, US
  6327        3514       1320      64  SHAW, CA
 16625        3157       1590    2338  AKAMAI-AS, US
   749        3037      50520    2304  DNIC-AS-00749, US
396982        2624       3588     357  GOOGLE-CLOUD-PLATFORM, US
  7018        2553      24117    1559  ATT-INTERNET4, US
 30036        2509        361     483  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        7165       1705     149  UNI2-AS, ES
 39891        4833        286      59  ALJAWWALSTC-AS, SA
 20940        4044       3399     164  AKAMAI-ASN1, NL
  8551        3891        370      37  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
 12389        2957       2292     913  ROSTELECOM-AS, RU
  9009        2664        252    1395  M247, RO
 34984        2267        359     612  TELLCOM-AS, TR
  6849        2135        339      19  UKRTELNET, UA
 58224        1849        949     547  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       11197       3340     579  Uninet S.A. de C.V., MX
 10620        3498        506     850  Telmex Colombia S.A., CO
 13999        2295        366     610  Mega Cable, S.A. de C.V., MX
 11830        2263        369      64  Instituto Costarricense de Electricidad
 28573        1330       2324     246  Claro NXT Telecomunicacoes Ltda, BR
  3816        1303        767     159  COLOMBIA TELECOMUNICACIONES S.A. ESP, C
  6503        1299        339     514  Axtel, S.A.B. de C.V., MX
  6147        1130        370      22  Telefonica del Peru S.A.A., PE
 11664        1102        180     454  Techtel LMDS Comunicaciones Interactiva
 26615        1030       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        1575        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        1019         67      53  ORANGE-COTE-IVOIRE, CI
 36935         880        520      42  Vodafone-, EG
  6713         549       1861      34  IAM-AS, MA
 15399         528         54      47  WANANCHI-, KE
 37342         493         32       1  MOVITEL, MZ
 24757         487         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       11197       3340     579  Uninet S.A. de C.V., MX
  9808        9511       8884      51  CHINAMOBILE-CN China Mobile Communicati
 16509        8118      10764    2897  AMAZON-02, US
 12479        7165       1705     149  UNI2-AS, ES
  7545        5755        786     691  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4867       4192      75  ERX-CERNET-BKB China Education and Rese
 39891        4833        286      59  ALJAWWALSTC-AS, SA
 11492        4534        300     620  CABLEONE, US
 20940        4044       3399     164  AKAMAI-ASN1, NL
  7155        3962        279      45  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        9511         9460  CHINAMOBILE-CN China Mobile Communications Grou
 12479        7165         7016  UNI2-AS, ES
 16509        8118         5221  AMAZON-02, US
  7545        5755         5064  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4867         4792  ERX-CERNET-BKB China Education and Research Net
 39891        4833         4774  ALJAWWALSTC-AS, SA
  7155        3962         3917  VIASAT-SP-BACKBONE, US
 11492        4534         3914  CABLEONE, US
 20940        4044         3880  AKAMAI-ASN1, NL
  8551        3891         3854  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
      3507  UNALLOCATED  5.105.166.0/24          213035  AS-SERVERION Serverion B.V.,
    398083  UNALLOCATED  5.133.124.0/24          399587  UT, US
     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

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     
/13:578     /14:1198    /15:2040    /16:13480   /17:8279    /18:13859   
/19:25215   /20:44274   /21:51595   /22:109669  /23:97628   /24:547681  
/25:740     /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        6223        7165  UNI2-AS, ES
  8151        5163       11197  Uninet S.A. de C.V., MX
 39891        3632        4833  ALJAWWALSTC-AS, SA
 11492        3442        4534  CABLEONE, US
  8551        3363        3891  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
  6327        3323        3514  SHAW, CA
  7155        3037        3962  VIASAT-SP-BACKBONE, US
 22773        2677        3622  ASN-CXA-ALL-CCI-22773-RDC, US
 30036        2166        2509  MEDIACOM-ENTERPRISE-BUSINESS, US
 10620        2052        3498  Telmex Colombia S.A., CO

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

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

   1:1703      2:1230      3:170       4:5         5:4458      6:122    
   7:6         8:1553      9:1        11:172      12:1577     13:392    
  14:2315     15:295      16:135      17:368      18:402      20:248    
  21:4        22:188      23:6138     24:2611     25:6        27:2493   
  29:19       31:2526     32:101      34:10       35:107      36:1913   
  37:4637     38:4378     39:807      40:151      41:3987     42:988    
  43:2332     44:309      45:16497    46:4247     47:377      49:1750   
  50:1835     51:570      52:1585     54:388      55:766      56:8      
  57:89       58:1752     59:1130     60:974      61:2440     62:2651   
  63:1909     64:5672     65:2317     66:4942     67:3016     68:1368   
  69:4178     70:1257     71:669      72:2972     74:2601     75:1463   
  76:607      77:2440     78:1861     79:3161     80:2078     81:1738   
  82:1499     83:1266     84:1538     85:3004     86:744      87:1963   
  88:1244     89:3625     90:613      91:7690     92:2035     93:2587   
  94:3581     95:3974     96:1329     97:335      98:1158     99:745    
 100:73      101:1070    102:2637    103:31162   104:4608    105:483    
 106:908     107:2557    108:987     109:4402    110:2080    111:3244   
 112:2055    113:1559    114:1634    115:2023    116:1923    117:2542   
 118:2278    119:1980    120:1779    121:1113    122:2601    123:2182   
 124:1619    125:2487    128:1315    129:1073    130:1009    131:2006   
 132:801     133:421     134:1901    135:300     136:862     137:934    
 138:2555    139:1526    140:1221    141:1494    142:1441    143:1500   
 144:1170    145:356     146:1939    147:1568    148:2336    149:1954   
 150:874     151:1154    152:1842    153:488     154:4280    155:1412   
 156:1683    157:1280    158:1045    159:2271    160:2537    161:1516   
 162:3538    163:1505    164:1593    165:1681    166:881     167:1712   
 168:3880    169:929     170:4610    171:882     172:3523    173:2949   
 174:1020    175:1160    176:3680    177:4602    178:3640    179:2198   
 180:2399    181:3424    182:3361    183:1932    184:2350    185:20169  
 186:4686    187:3975    188:4086    189:3613    190:9150    191:1441   
 192:10953   193:8847    194:7278    195:5166    196:3099    197:2394   
 198:5957    199:6096    200:7879    201:5877    202:10753   203:10217  
 204:4621    205:3542    206:3943    207:3456    208:4081    209:4883   
 210:4435    211:2497    212:4117    213:3535    214:1083    215:60     
 216:6610    217:2678    218:1290    219:580     220:2012    221:974    
 222:888     223:2166   

End of report


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