[SANOG] Weekly Global IPv4 Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri Sep 17 18:03:25 UTC 2021


This is an automated weekly mailing describing the state of the Internet
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 http://thyme.rand.apnic.net.

If you have any comments please contact Philip Smith <pfsinoz at gmail.com>.

Global IPv4 Routing Table Report   04:00 +10GMT Sat 18 Sep, 2021

Report Website:     http://thyme.rand.apnic.net
Detailed Analysis:  http://thyme.rand.apnic.net/current/

Analysis Summary
----------------

BGP routing table entries examined:                              862995
    Prefixes after maximum aggregation (per Origin AS):          326303
    Deaggregation factor:                                          2.64
    Unique aggregates announced (without unneeded subnets):      415008
Total ASes present in the Internet Routing Table:                 71963
    Prefixes per ASN:                                             11.99
Origin-only ASes present in the Internet Routing Table:           61847
Origin ASes announcing only one prefix:                           25513
Transit ASes present in the Internet Routing Table:               10116
Transit-only ASes present in the Internet Routing Table:            335
Average AS path length visible in the Internet Routing Table:       4.3
    Max AS path length visible:                                      37
    Max AS path prepend of ASN ( 45609)                              34
Prefixes from unregistered ASNs in the Routing Table:               926
    Number of instances of unregistered ASNs:                       931
Number of 32-bit ASNs allocated by the RIRs:                      37242
Number of 32-bit ASNs visible in the Routing Table:               30939
Prefixes from 32-bit ASNs in the Routing Table:                  144083
Number of bogon 32-bit ASNs visible in the Routing Table:            32
Special use prefixes present in the Routing Table:                    1
Prefixes being announced from unallocated address space:            465
Number of addresses announced to Internet:                   3054633344
    Equivalent to 182 /8s, 18 /16s and 1 /24s
    Percentage of available address space announced:               82.5
    Percentage of allocated address space announced:               82.5
    Percentage of available address space allocated:              100.0
    Percentage of address space in use by end-sites:               99.5
Total number of prefixes smaller than registry allocations:      286863

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

Prefixes being announced by APNIC Region ASes:                   231782
    Total APNIC prefixes after maximum aggregation:               66191
    APNIC Deaggregation factor:                                    3.50
Prefixes being announced from the APNIC address blocks:          227246
    Unique aggregates announced from the APNIC address blocks:    91493
APNIC Region origin ASes present in the Internet Routing Table:   11963
    APNIC Prefixes per ASN:                                       19.00
APNIC Region origin ASes announcing only one prefix:               3393
APNIC Region transit ASes present in the Internet Routing Table:   1675
Average APNIC Region AS path length visible:                        4.5
    Max APNIC Region AS path length visible:                         37
Number of APNIC region 32-bit ASNs visible in the Routing Table:   7118
Number of APNIC addresses announced to Internet:              773766656
    Equivalent to 46 /8s, 30 /16s and 190 /24s
APNIC AS Blocks        4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations)  23552-24575, 37888-38911, 45056-46079, 55296-56319,
                       58368-59391, 63488-64098, 64297-64395, 131072-147769
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:                    251907
    Total ARIN prefixes after maximum aggregation:               115275
    ARIN Deaggregation factor:                                     2.19
Prefixes being announced from the ARIN address blocks:           251845
    Unique aggregates announced from the ARIN address blocks:    120093
ARIN Region origin ASes present in the Internet Routing Table:    18911
    ARIN Prefixes per ASN:                                        13.32
ARIN Region origin ASes announcing only one prefix:                6886
ARIN Region transit ASes present in the Internet Routing Table:    1956
Average ARIN Region AS path length visible:                         3.9
    Max ARIN Region AS path length visible:                          28
Number of ARIN region 32-bit ASNs visible in the Routing Table:    4111
Number of ARIN addresses announced to Internet:              1284624128
    Equivalent to 76 /8s, 145 /16s and 207 /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:                    240497
    Total RIPE prefixes after maximum aggregation:               112388
    RIPE Deaggregation factor:                                     2.14
Prefixes being announced from the RIPE address blocks:           236680
    Unique aggregates announced from the RIPE address blocks:    144864
RIPE Region origin ASes present in the Internet Routing Table:    28032
    RIPE Prefixes per ASN:                                         8.44
RIPE Region origin ASes announcing only one prefix:               12053
RIPE Region transit ASes present in the Internet Routing Table:    3903
Average RIPE Region AS path length visible:                         4.3
    Max RIPE Region AS path length visible:                          29
Number of RIPE region 32-bit ASNs visible in the Routing Table:   10392
Number of RIPE addresses announced to Internet:               711440512
    Equivalent to 42 /8s, 103 /16s and 184 /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:                  111606
    Total LACNIC prefixes after maximum aggregation:              26532
    LACNIC Deaggregation factor:                                   4.21
Prefixes being announced from the LACNIC address blocks:         112559
    Unique aggregates announced from the LACNIC address blocks:   47147
LACNIC Region origin ASes present in the Internet Routing Table:  10785
    LACNIC Prefixes per ASN:                                      10.44
LACNIC Region origin ASes announcing only one prefix:              2639
LACNIC Region transit ASes present in the Internet Routing Table:  2107
Average LACNIC Region AS path length visible:                       4.9
    Max LACNIC Region AS path length visible:                        29
Number of LACNIC region 32-bit ASNs visible in the Routing Table:  8444
Number of LACNIC addresses announced to Internet:             176280064
    Equivalent to 10 /8s, 129 /16s and 210 /24s
LACNIC AS Blocks       26592-26623, 27648-28671, 52224-53247,
                       61440-61951, 64099-64197, 262144-272796 + 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:                  26277
    Total AfriNIC prefixes after maximum aggregation:              5204
    AfriNIC Deaggregation factor:                                  5.05
Prefixes being announced from the AfriNIC address blocks:         34200
    Unique aggregates announced from the AfriNIC address blocks:  10999
AfriNIC Region origin ASes present in the Internet Routing Table:  1543
    AfriNIC Prefixes per ASN:                                     22.16
AfriNIC Region origin ASes announcing only one prefix:              542
AfriNIC Region transit ASes present in the Internet Routing Table:  306
Average AfriNIC Region AS path length visible:                      5.1
    Max AfriNIC Region AS path length visible:                       25
Number of AfriNIC region 32-bit ASNs visible in the Routing Table:  874
Number of AfriNIC addresses announced to Internet:            108186624
    Equivalent to 6 /8s, 114 /16s and 204 /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        8037       9000      57  CMNET-GD Guangdong Mobile Communication
  7545        5824        785     678  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4711       4192      74  ERX-CERNET-BKB China Education and Rese
  7552        3661       1330      20  VIETEL-AS-AP Viettel Group, VN
  7713        3507       1023      56  TELKOMNET-AS-AP PT Telekomunikasi Indon
 45899        2900       1897      56  VNPT-AS-VN VNPT Corp, VN
  4766        2502      11120     582  KIXS-AS-KR Korea Telecom, KR
  9498        2364        502     239  BBIL-AP BHARTI Airtel Ltd., IN
 45090        2127       1198      75  CNNIC-TENCENT-NET-AP Shenzhen Tencent C
  4755        2115        437     192  TATACOMM-AS TATA Communications formerl

Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-APNIC

ARIN Region per AS prefix count summary
---------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
 16509        5576       9716    2467  AMAZON-02, US
 11492        4650        308     759  CABLEONE, US
 22773        4028       3035     307  ASN-CXA-ALL-CCI-22773-RDC, US
  7155        3961        264      32  VIASAT-SP-BACKBONE, US
 16625        3590       1854    2500  AKAMAI-AS, US
  6327        3368       1318      66  SHAW, CA
 30036        2593        375     163  MEDIACOM-ENTERPRISE-BUSINESS, US
   209        2508       5029     448  CENTURYLINK-US-LEGACY-QWEST, US
 20115        2241       3032     504  CHARTER-20115, US
  5972        2166        489     787  DNIC-ASBLK-05800-06055, US

Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-ARIN

RIPE Region per AS prefix count summary
---------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
 12479        6894       1726     143  UNI2-AS, ES
 20940        3796       3348     215  AKAMAI-ASN1, NL
  8551        3291        378      39  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
 39891        3269        187      23  ALJAWWALSTC-AS, SA
 12389        2907       2279     895  ROSTELECOM-AS, RU
  9009        2508        262    1333  M247, GB
 34984        2224        357     598  TELLCOM-AS, TR
 61317        1776        267     976  ASDETUK www.heficed.com, GB
 58224        1639        891     570  TCI, IR
 13188        1610        100      27  TRIOLAN, UA

Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-RIPE

LACNIC Region per AS prefix count summary
-----------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
  8151        8553       3454     577  Uninet S.A. de C.V., MX
 10620        3416        523     677  Telmex Colombia S.A., CO
 11830        2497        369      62  Instituto Costarricense de Electricidad
 13999        1717        384     465  Mega Cable, S.A. de C.V., MX
  6503        1514        359     477  Axtel, S.A.B. de C.V., MX
 28573        1463       2304     231  CLARO S.A., BR
  3816        1240        652     152  COLOMBIA TELECOMUNICACIONES S.A. ESP, C
 26615        1131       2351     134  TIM SA, BR
  6147        1086        369      22  Telefonica del Peru S.A.A., PE
 11172         957        111      70  Alestra, S. de R.L. de C.V., MX

Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-LACNIC

AfriNIC Region per AS prefix count summary
------------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
 24863        1633        393      20  LINKdotNET-AS, EG
 24835        1463        499      33  RAYA-AS, EG
 36992        1289       1417     272  ETISALAT-MISR, EG
 36903        1183        537     110  MT-MPLS, MA
 29571         781         68      11  ORANGE-COTE-IVOIRE, CI
  6713         612       1863      34  IAM-AS, MA
 36935         578        522      40  Vodafone-, EG
 15399         502         49      29  WANANCHI-, KE
 37342         469         32       1  MOVITEL, MZ
  2018         343        319      74  TENET-1, ZA

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

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

   ASN  No of nets  /20 equiv  MaxAgg  Description
  8151        8553       3454     577  Uninet S.A. de C.V., MX
  9808        8037       9000      57  CMNET-GD Guangdong Mobile Communication
 12479        6894       1726     143  UNI2-AS, ES
  7545        5824        785     678  TPG-INTERNET-AP TPG Telecom Limited, AU
 16509        5576       9716    2467  AMAZON-02, US
  4538        4711       4192      74  ERX-CERNET-BKB China Education and Rese
 11492        4650        308     759  CABLEONE, US
 22773        4028       3035     307  ASN-CXA-ALL-CCI-22773-RDC, US
  7155        3961        264      32  VIASAT-SP-BACKBONE, US
 20940        3796       3348     215  AKAMAI-ASN1, NL

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

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

   ASN  No of nets  Net Savings  Description
  9808        8037         7980  CMNET-GD Guangdong Mobile Communication Co.Ltd.
 12479        6894         6751  UNI2-AS, ES
  7545        5824         5146  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4711         4637  ERX-CERNET-BKB China Education and Research Net
  7155        3961         3929  VIASAT-SP-BACKBONE, US
 11492        4650         3891  CABLEONE, US
 22773        4028         3721  ASN-CXA-ALL-CCI-22773-RDC, US
  7552        3661         3641  VIETEL-AS-AP Viettel Group, VN
 20940        3796         3581  AKAMAI-ASN1, NL
  7713        3507         3451  TELKOMNET-AS-AP PT Telekomunikasi Indonesia, ID

Complete listing at http://thyme.rand.apnic.net/current/data-CIDRnet

List of Unregistered Origin ASNs (Global)
-----------------------------------------

    Bad AS  Designation  Net Originated      Transit AS  Transit AS Name
     62828  UNALLOCATED  8.21.130.0/24             3356  LEVEL3, US
    393266  UNALLOCATED  8.23.52.0/24             46887  LIGHTOWER, US
     18604  UNALLOCATED  8.25.204.0/24             3356  LEVEL3, US
    394936  UNALLOCATED  8.33.224.0/24              174  COGENT-174, US
     54338  UNALLOCATED  8.33.241.0/24             6461  ZAYO-6461, US
     23061  UNALLOCATED  8.39.119.0/24             3356  LEVEL3, US
      1782  UNALLOCATED  8.42.19.0/24             46887  LIGHTOWER, US
    395438  UNALLOCATED  8.42.206.0/24             3356  LEVEL3, US
    395056  UNALLOCATED  8.45.133.0/24             3356  LEVEL3, US
     32306  UNALLOCATED  8.46.80.0/24             33652  CMCS, US

Complete listing at http://thyme.rand.apnic.net/current/data-badAS

Prefixes from private and non-routed address space (Global)
-----------------------------------------------------------

Prefix                Origin AS  Description
192.88.99.0/24             6939  HURRICANE, US

Complete listing at http://thyme.rand.apnic.net/current/data-dsua

Advertised Unallocated Addresses
--------------------------------

Unassigned Network     ASN Information  AS Name
23.132.208.0/24      Origin:      7850  CITYLINKFIBER, US
23.132.208.0/24     Transit:     15164  UPNLLC, US
23.141.0.0/24        Origin:    395350  UNASSIGNED
23.141.0.0/24       Transit:     11426  TWC-11426-CAROLINAS, 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 
41.57.124.0/22       Origin:     37442  UNASSIGNED
41.57.124.0/22      Transit:       174  COGENT-174, US
41.57.124.0/23       Origin:     37442  UNASSIGNED
41.57.124.0/23      Transit:     37204  TELONE, ZW

Complete listing at http://thyme.rand.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      /10:41      /11:100     /12:301     
/13:596     /14:1215    /15:2037    /16:13419   /17:8267    /18:14009   
/19:25398   /20:42555   /21:50911   /22:107040  /23:92168   /24:503459  
/25:1450    /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        5819        6894  UNI2-AS, ES
 11492        3602        4650  CABLEONE, US
  6327        3176        3368  SHAW, CA
  7155        3049        3961  VIASAT-SP-BACKBONE, US
 22773        2998        4028  ASN-CXA-ALL-CCI-22773-RDC, US
  8151        2943        8553  Uninet S.A. de C.V., MX
 39891        2805        3269  ALJAWWALSTC-AS, SA
  8551        2757        3291  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
 30036        2247        2593  MEDIACOM-ENTERPRISE-BUSINESS, US
 11830        1931        2497  Instituto Costarricense de Electricidad y Telec

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

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

   1:1913      2:1098      3:145       4:20        5:3599      6:83     
   7:5         8:1543      9:1        11:164      12:1735     13:385    
  14:2285     15:104      16:23       17:355      18:113      20:126    
  21:4        22:188      23:5101     24:2451     25:2        27:2532   
  29:19       31:2360     32:113      34:1        35:47       36:1728   
  37:3840     38:2237     39:641      40:165      41:3795     42:985    
  43:2060     44:286      45:15395    46:3737     47:354      48:7      
  49:1632     50:1813     51:101      52:1284     54:249      55:747    
  56:4        57:54       58:1736     59:1191     60:933      61:2314   
  62:2294     63:1955     64:5367     65:2363     66:4992     67:2868   
  68:1165     69:4121     70:1363     71:677      72:3154     74:2626   
  75:1499     76:696      77:2036     78:1679     79:2622     80:1872   
  81:1554     82:1399     83:1153     84:1310     85:2762     86:719    
  87:1826     88:973      89:3032     90:516      91:7381     92:1828   
  93:2551     94:3156     95:3500     96:1304     97:345      98:978    
  99:959     100:76      101:1057    102:1682    103:26934   104:4021   
 105:436     106:827     107:2335    108:729     109:3865    110:2047   
 111:3131    112:1938    113:1412    114:1473    115:1929    116:1872   
 117:2409    118:2305    119:1892    120:1555    121:1081    122:2524   
 123:2164    124:1605    125:2080    128:1347    129:1369    130:882    
 131:2027    132:773     133:362     134:1852    135:312     136:785    
 137:849     138:2394    139:1189    140:757     141:1215    142:1201   
 143:1351    144:1269    145:325     146:1517    147:1404    148:2159   
 149:1509    150:820     151:1086    152:1638    153:428     154:3056   
 155:1337    156:1761    157:1222    158:990     159:2027    160:2360   
 161:1254    162:3389    163:1097    164:1548    165:1430    166:593    
 167:1656    168:3635    169:692     170:4314    171:806     172:2755   
 173:2874    174:1001    175:1106    176:3282    177:4451    178:3001   
 179:1886    180:2245    181:2654    182:3252    183:2021    184:2417   
 185:18848   186:4240    187:3130    188:3341    189:2877    190:8688   
 191:1349    192:10724   193:8303    194:6784    195:4850    196:2908   
 197:2117    198:6030    199:5935    200:7363    201:5228    202:10527  
 203:10025   204:4525    205:3389    206:3784    207:3365    208:4036   
 209:4755    210:4180    211:2360    212:3769    213:3394    214:1168   
 215:64      216:6375    217:2588    218:1219    219:673     220:1958   
 221:980     222:854     223:2047   

End of report


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