[SANOG] Weekly Global IPv4 Routing Table Report

Routing Table Analysis Role Account cscora at apnic.net
Fri May 12 18:03:40 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 13 May, 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:                              922283
    Prefixes after maximum aggregation (per Origin AS):          349580
    Deaggregation factor:                                          2.64
    Unique aggregates announced (without unneeded subnets):      449017
Total ASes present in the Internet Routing Table:                 74436
    Prefixes per ASN:                                             12.39
Origin-only ASes present in the Internet Routing Table:           63869
Origin ASes announcing only one prefix:                           26242
Transit ASes present in the Internet Routing Table:               10567
Transit-only ASes present in the Internet Routing Table:            431
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:              1095
    Number of instances of unregistered ASNs:                      1095
Number of 32-bit ASNs allocated by the RIRs:                      41848
Number of 32-bit ASNs visible in the Routing Table:               34589
Prefixes from 32-bit ASNs in the Routing Table:                  171578
Number of bogon 32-bit ASNs visible in the Routing Table:            13
Special use prefixes present in the Routing Table:                    1
Prefixes being announced from unallocated address space:            633
Number of addresses announced to Internet:                   3057963648
    Equivalent to 182 /8s, 68 /16s and 210 /24s
    Percentage of available address space announced:               82.6
    Percentage of allocated address space announced:               82.6
    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:      308163

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

Prefixes being announced by APNIC Region ASes:                   244341
    Total APNIC prefixes after maximum aggregation:               69435
    APNIC Deaggregation factor:                                    3.52
Prefixes being announced from the APNIC address blocks:          238480
    Unique aggregates announced from the APNIC address blocks:    98015
APNIC Region origin ASes present in the Internet Routing Table:   13438
    APNIC Prefixes per ASN:                                       17.75
APNIC Region origin ASes announcing only one prefix:               3959
APNIC Region transit ASes present in the Internet Routing Table:   1801
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:   8741
Number of APNIC addresses announced to Internet:              773569024
    Equivalent to 46 /8s, 27 /16s and 186 /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:                    269926
    Total ARIN prefixes after maximum aggregation:               122606
    ARIN Deaggregation factor:                                     2.20
Prefixes being announced from the ARIN address blocks:           272521
    Unique aggregates announced from the ARIN address blocks:    130293
ARIN Region origin ASes present in the Internet Routing Table:    19109
    ARIN Prefixes per ASN:                                        14.26
ARIN Region origin ASes announcing only one prefix:                6979
ARIN Region transit ASes present in the Internet Routing Table:    1963
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:    4801
Number of ARIN addresses announced to Internet:              1281368832
    Equivalent to 76 /8s, 96 /16s and 35 /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:                    259839
    Total RIPE prefixes after maximum aggregation:               122382
    RIPE Deaggregation factor:                                     2.12
Prefixes being announced from the RIPE address blocks:           255957
    Unique aggregates announced from the RIPE address blocks:    158551
RIPE Region origin ASes present in the Internet Routing Table:    28328
    RIPE Prefixes per ASN:                                         9.04
RIPE Region origin ASes announcing only one prefix:               12060
RIPE Region transit ASes present in the Internet Routing Table:    3967
Average RIPE Region AS path length visible:                         4.2
    Max RIPE Region AS path length visible:                          30
Number of RIPE region 32-bit ASNs visible in the Routing Table:   11174
Number of RIPE addresses announced to Internet:               718188416
    Equivalent to 42 /8s, 206 /16s and 175 /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:                  118033
    Total LACNIC prefixes after maximum aggregation:              28538
    LACNIC Deaggregation factor:                                   4.14
Prefixes being announced from the LACNIC address blocks:         117320
    Unique aggregates announced from the LACNIC address blocks:   49374
LACNIC Region origin ASes present in the Internet Routing Table:  11000
    LACNIC Prefixes per ASN:                                      10.67
LACNIC Region origin ASes announcing only one prefix:              2632
LACNIC Region transit ASes present in the Internet Routing Table:  2294
Average LACNIC Region AS path length visible:                       5.0
    Max LACNIC Region AS path length visible:                        55
Number of LACNIC region 32-bit ASNs visible in the Routing Table:  8787
Number of LACNIC addresses announced to Internet:             176734720
    Equivalent to 10 /8s, 136 /16s and 194 /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:                  29049
    Total AfriNIC prefixes after maximum aggregation:              5826
    AfriNIC Deaggregation factor:                                  4.99
Prefixes being announced from the AfriNIC address blocks:         37372
    Unique aggregates announced from the AfriNIC address blocks:  12254
AfriNIC Region origin ASes present in the Internet Routing Table:  1739
    AfriNIC Prefixes per ASN:                                     21.49
AfriNIC Region origin ASes announcing only one prefix:              612
AfriNIC Region transit ASes present in the Internet Routing Table:  333
Average AfriNIC Region AS path length visible:                      5.0
    Max AfriNIC Region AS path length visible:                       30
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 1086
Number of AfriNIC addresses announced to Internet:            107688448
    Equivalent to 6 /8s, 107 /16s and 50 /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        9489       8706      40  CHINAMOBILE-CN China Mobile Communicati
  7545        5720        784     689  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4863       4192      75  ERX-CERNET-BKB China Education and Rese
 45899        4053       1877      47  VNPT-AS-VN VNPT Corp, VN
  7713        3563       1043      65  TELKOMNET-AS-AP PT Telekomunikasi Indon
  7552        3228       1331      21  VIETEL-AS-AP Viettel Group, VN
  9498        2958        491     239  BBIL-AP BHARTI Airtel Ltd., IN
  4766        2551      11251     591  KIXS-AS-KR Korea Telecom, KR
 24560        2394        836     446  AIRTELBROADBAND-AS-AP Bharti Airtel Ltd
 18403        2320        347      25  FPT-AS-AP FPT Telecom Company, VN

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        8300      10781    2923  AMAZON-02, US
 11492        4535        300     609  CABLEONE, US
  7155        4002        281      51  VIASAT-SP-BACKBONE, US
 22773        3586       3057     283  ASN-CXA-ALL-CCI-22773-RDC, US
  6327        3525       1320      64  SHAW, CA
 16625        3108       1572    2356  AKAMAI-AS, US
   749        3100      54980    2352  DNIC-AS-00749, US
396982        2637       3591     368  GOOGLE-CLOUD-PLATFORM, US
 30036        2496        359     466  MEDIACOM-ENTERPRISE-BUSINESS, US
  7018        2485      24147    1560  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        7298       1707     141  UNI2-AS, ES
 39891        4833        286      59  ALJAWWALSTC-AS, SA
 20940        4088       3399     164  AKAMAI-ASN1, NL
  8551        3882        370      37  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
 12389        2947       2292     910  ROSTELECOM-AS, RU
  9009        2708        251    1399  M247, RO
 34984        2278        360     610  TELLCOM-AS, TR
  6849        2017        307      17  UKRTELNET, UA
 58224        1851        950     535  TCI, IR
 13188        1607        100      18  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       11276       3330     597  Uninet S.A. de C.V., MX
 10620        3518        508     854  Telmex Colombia S.A., CO
 13999        2349        361     620  Mega Cable, S.A. de C.V., MX
 11830        2270        369      64  Instituto Costarricense de Electricidad
 28573        1330       2323     240  Claro NXT Telecomunicacoes Ltda, BR
  6503        1300        339     514  Axtel, S.A.B. de C.V., MX
  3816        1293        760     170  COLOMBIA TELECOMUNICACIONES S.A. ESP, C
  6147        1134        370      22  Telefonica del Peru S.A.A., PE
 11664        1099        180     448  Techtel LMDS Comunicaciones Interactiva
 26615        1035       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        1601        393      19  LINKdotNET-AS, EG
 24835        1499        533      30  RAYA-AS, EG
 36992        1339       1518     276  ETISALAT-MISR, EG
 36903        1242        550      99  MT-MPLS, MA
 29571        1025         67      46  ORANGE-COTE-IVOIRE, CI
 36935         875        520      42  Vodafone-, EG
  6713         550       1861      34  IAM-AS, MA
 15399         530         54      48  WANANCHI-, KE
 37342         489         32       1  MOVITEL, MZ
 24757         481         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       11276       3330     597  Uninet S.A. de C.V., MX
  9808        9489       8706      40  CHINAMOBILE-CN China Mobile Communicati
 16509        8300      10781    2923  AMAZON-02, US
 12479        7298       1707     141  UNI2-AS, ES
  7545        5720        784     689  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4863       4192      75  ERX-CERNET-BKB China Education and Rese
 39891        4833        286      59  ALJAWWALSTC-AS, SA
 11492        4535        300     609  CABLEONE, US
 20940        4088       3399     164  AKAMAI-ASN1, NL
 45899        4053       1877      47  VNPT-AS-VN VNPT Corp, VN

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

Global Per AS Maximum Aggregation summary
-----------------------------------------

   ASN  No of nets  Net Savings  Description
  9808        9489         9449  CHINAMOBILE-CN China Mobile Communications Grou
 12479        7298         7157  UNI2-AS, ES
 16509        8300         5377  AMAZON-02, US
  7545        5720         5031  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4863         4788  ERX-CERNET-BKB China Education and Research Net
 39891        4833         4774  ALJAWWALSTC-AS, SA
 45899        4053         4006  VNPT-AS-VN VNPT Corp, VN
  7155        4002         3951  VIASAT-SP-BACKBONE, US
 11492        4535         3926  CABLEONE, US
 20940        4088         3924  AKAMAI-ASN1, NL

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  2.57.241.0/24           213035  AS-SERVERION Serverion B.V.,
      3507  UNALLOCATED  5.105.49.0/24           213035  AS-SERVERION Serverion B.V.,
      3507  UNALLOCATED  5.105.69.0/24           213035  AS-SERVERION Serverion B.V.,
      3507  UNALLOCATED  5.105.206.0/24          213035  AS-SERVERION Serverion B.V.,
     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
     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

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
23.139.232.0/24      Origin:    211619  MAXKO, HR
23.139.232.0/24     Transit:     42864  GIGANET-HU GigaNet Internet Service Prov
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  UNASSIGNED
23.141.0.0/24       Transit:     11426  TWC-11426-CAROLINAS, US
23.153.24.0/24       Origin:    394144  LTYCONNECT, US
23.153.24.0/24      Transit:      6939  HURRICANE, US
27.100.7.0/24        Origin:     56096  UNASSIGNED
27.100.7.0/24       Transit:     45455  TH-2S1N-AP Two S One N Co Ltd, Internet 

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      /10:39      /11:104     /12:301     
/13:579     /14:1198    /15:2052    /16:13471   /17:8232    /18:14296   
/19:25201   /20:44246   /21:51321   /22:109756  /23:98070   /24:552641  
/25:746     /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        6362        7298  UNI2-AS, ES
  8151        5237       11276  Uninet S.A. de C.V., MX
 39891        3632        4833  ALJAWWALSTC-AS, SA
 11492        3443        4535  CABLEONE, US
  8551        3354        3882  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
  6327        3334        3525  SHAW, CA
  7155        3069        4002  VIASAT-SP-BACKBONE, US
 22773        2650        3586  ASN-CXA-ALL-CCI-22773-RDC, US
 30036        2153        2496  MEDIACOM-ENTERPRISE-BUSINESS, US
 10620        2071        3518  Telmex Colombia S.A., CO

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

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

   1:1832      2:1310      3:174       4:5         5:4543      6:129    
   7:6         8:1556      9:1        11:172      12:1536     13:385    
  14:2337     15:300      16:189      17:373      18:421      20:258    
  21:4        22:188      23:6244     24:2607     25:6        27:2456   
  29:19       31:2499     32:79       34:12       35:109      36:1960   
  37:4700     38:4579     39:842      40:151      41:3904     42:1282   
  43:2358     44:307      45:16554    46:4327     47:363      49:1756   
  50:1854     51:567      52:1600     54:394      55:774      56:8      
  57:114      58:1792     59:1157     60:987      61:2490     62:2688   
  63:1925     64:5680     65:2323     66:5037     67:3000     68:1347   
  69:4096     70:1251     71:670      72:2994     74:2622     75:1553   
  76:613      77:2454     78:1815     79:3172     80:2126     81:1780   
  82:1498     83:1284     84:1529     85:2980     86:768      87:2030   
  88:1169     89:3701     90:615      91:7747     92:2065     93:2625   
  94:3617     95:4020     96:1312     97:336      98:1152     99:743    
 100:73      101:1073    102:2674    103:31357   104:4667    105:488    
 106:948     107:2526    108:1042    109:4422    110:2109    111:3154   
 112:2036    113:1658    114:1655    115:1982    116:1913    117:2529   
 118:2390    119:2011    120:1824    121:1130    122:2605    123:2179   
 124:1611    125:2502    128:1401    129:1088    130:1024    131:2011   
 132:809     133:422     134:1927    135:304     136:873     137:950    
 138:2548    139:1573    140:1245    141:1452    142:1443    143:1515   
 144:1168    145:347     146:1956    147:1583    148:2373    149:2245   
 150:872     151:1159    152:1824    153:487     154:4421    155:1451   
 156:1786    157:1307    158:1073    159:2304    160:2545    161:1534   
 162:3506    163:1517    164:1617    165:1726    166:1055    167:1726   
 168:3882    169:934     170:4579    171:873     172:3548    173:2934   
 174:1077    175:1178    176:3706    177:4599    178:3601    179:2168   
 180:2572    181:3485    182:3391    183:1989    184:2345    185:20227  
 186:4682    187:3985    188:4123    189:3579    190:9126    191:1438   
 192:10931   193:8892    194:7310    195:5175    196:3089    197:2368   
 198:5971    199:6104    200:8041    201:5908    202:10699   203:10318  
 204:4581    205:3688    206:4311    207:3457    208:4097    209:4880   
 210:4445    211:2509    212:4170    213:3623    214:1089    215:59     
 216:6648    217:2697    218:1299    219:578     220:2002    221:976    
 222:886     223:2187   

End of report


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