[SANOG] Weekly Global IPv4 Routing Table Report

Routing Table Analysis Role Account cscora at apnic.net
Fri Feb 11 18:02:57 UTC 2022


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 12 Feb, 2022

  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:                              888216
    Prefixes after maximum aggregation (per Origin AS):          334710
    Deaggregation factor:                                          2.65
    Unique aggregates announced (without unneeded subnets):      427455
Total ASes present in the Internet Routing Table:                 72833
    Prefixes per ASN:                                             12.20
Origin-only ASes present in the Internet Routing Table:           62489
Origin ASes announcing only one prefix:                           25802
Transit ASes present in the Internet Routing Table:               10344
Transit-only ASes present in the Internet Routing Table:            368
Average AS path length visible in the Internet Routing Table:       4.3
    Max AS path length visible:                                      53
    Max AS path prepend of ASN (265020)                              50
Prefixes from unregistered ASNs in the Routing Table:               962
    Number of instances of unregistered ASNs:                       965
Number of 32-bit ASNs allocated by the RIRs:                      38545
Number of 32-bit ASNs visible in the Routing Table:               32109
Prefixes from 32-bit ASNs in the Routing Table:                  149645
Number of bogon 32-bit ASNs visible in the Routing Table:            22
Special use prefixes present in the Routing Table:                    1
Prefixes being announced from unallocated address space:            562
Number of addresses announced to Internet:                   3068928512
    Equivalent to 182 /8s, 236 /16s and 34 /24s
    Percentage of available address space announced:               82.9
    Percentage of allocated address space announced:               82.9
    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:      300423

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

Prefixes being announced by APNIC Region ASes:                   233450
    Total APNIC prefixes after maximum aggregation:               65864
    APNIC Deaggregation factor:                                    3.54
Prefixes being announced from the APNIC address blocks:          228289
    Unique aggregates announced from the APNIC address blocks:    94179
APNIC Region origin ASes present in the Internet Routing Table:   12370
    APNIC Prefixes per ASN:                                       18.46
APNIC Region origin ASes announcing only one prefix:               3541
APNIC Region transit ASes present in the Internet Routing Table:   1714
Average APNIC Region AS path length visible:                        4.6
    Max APNIC Region AS path length visible:                         29
Number of APNIC region 32-bit ASNs visible in the Routing Table:   7566
Number of APNIC addresses announced to Internet:              774475904
    Equivalent to 46 /8s, 41 /16s and 144 /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:                    258538
    Total ARIN prefixes after maximum aggregation:               119014
    ARIN Deaggregation factor:                                     2.17
Prefixes being announced from the ARIN address blocks:           258644
    Unique aggregates announced from the ARIN address blocks:    123403
ARIN Region origin ASes present in the Internet Routing Table:    18983
    ARIN Prefixes per ASN:                                        13.63
ARIN Region origin ASes announcing only one prefix:                6899
ARIN Region transit ASes present in the Internet Routing Table:    1960
Average ARIN Region AS path length visible:                         3.8
    Max ARIN Region AS path length visible:                          35
Number of ARIN region 32-bit ASNs visible in the Routing Table:    4342
Number of ARIN addresses announced to Internet:              1295964160
    Equivalent to 77 /8s, 62 /16s and 216 /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:                    253719
    Total RIPE prefixes after maximum aggregation:               116382
    RIPE Deaggregation factor:                                     2.18
Prefixes being announced from the RIPE address blocks:           250101
    Unique aggregates announced from the RIPE address blocks:    148984
RIPE Region origin ASes present in the Internet Routing Table:    28185
    RIPE Prefixes per ASN:                                         8.87
RIPE Region origin ASes announcing only one prefix:               12134
RIPE Region transit ASes present in the Internet Routing Table:    3977
Average RIPE Region AS path length visible:                         4.3
    Max RIPE Region AS path length visible:                          32
Number of RIPE region 32-bit ASNs visible in the Routing Table:   10644
Number of RIPE addresses announced to Internet:               713448576
    Equivalent to 42 /8s, 134 /16s and 92 /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:                  113955
    Total LACNIC prefixes after maximum aggregation:              27367
    LACNIC Deaggregation factor:                                   4.16
Prefixes being announced from the LACNIC address blocks:         114689
    Unique aggregates announced from the LACNIC address blocks:   48536
LACNIC Region origin ASes present in the Internet Routing Table:  10944
    LACNIC Prefixes per ASN:                                      10.48
LACNIC Region origin ASes announcing only one prefix:              2676
LACNIC Region transit ASes present in the Internet Routing Table:  2210
Average LACNIC Region AS path length visible:                       4.9
    Max LACNIC Region AS path length visible:                        53
Number of LACNIC region 32-bit ASNs visible in the Routing Table:  8630
Number of LACNIC addresses announced to Internet:             176510208
    Equivalent to 10 /8s, 133 /16s and 85 /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:                  27592
    Total AfriNIC prefixes after maximum aggregation:              5367
    AfriNIC Deaggregation factor:                                  5.14
Prefixes being announced from the AfriNIC address blocks:         35931
    Unique aggregates announced from the AfriNIC address blocks:  11875
AfriNIC Region origin ASes present in the Internet Routing Table:  1593
    AfriNIC Prefixes per ASN:                                     22.56
AfriNIC Region origin ASes announcing only one prefix:              552
AfriNIC Region transit ASes present in the Internet Routing Table:  312
Average AfriNIC Region AS path length visible:                      5.1
    Max AfriNIC Region AS path length visible:                       34
Number of AfriNIC region 32-bit ASNs visible in the Routing Table:  927
Number of AfriNIC addresses announced to Internet:            108164608
    Equivalent to 6 /8s, 114 /16s and 118 /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        9059       8886      46  CHINAMOBILE-CN China Mobile Communicati
  7545        5867        788     691  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4681       4192      74  ERX-CERNET-BKB China Education and Rese
  7552        3596       1330      20  VIETEL-AS-AP Viettel Group, VN
  7713        3484       1038      51  TELKOMNET-AS-AP PT Telekomunikasi Indon
 45899        3435       1880      57  VNPT-AS-VN VNPT Corp, VN
  4766        2557      11123     631  KIXS-AS-KR Korea Telecom, KR
  9498        2317        475     235  BBIL-AP BHARTI Airtel Ltd., IN
 45090        2170       1438      79  TENCENT-NET-AP Shenzhen Tencent Compute
  4755        2114        429     198  TATACOMM-AS TATA Communications formerl

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        6241      10151    2680  AMAZON-02, US
 11492        4514        299     785  CABLEONE, US
 22773        3963       3028     367  ASN-CXA-ALL-CCI-22773-RDC, US
  7155        3902        264      30  VIASAT-SP-BACKBONE, US
 16625        3650       1883    2564  AKAMAI-AS, US
  6327        3376       1318      63  SHAW, CA
   749        2887      50780    2143  DNIC-AS-00749, US
 30036        2608        374     150  MEDIACOM-ENTERPRISE-BUSINESS, US
   209        2519       4962     428  CENTURYLINK-US-LEGACY-QWEST, US
 20115        2253       3036     500  CHARTER-20115, 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        6801       1715     152  UNI2-AS, ES
  9121        6745       1692      17  TTNET, TR
  8551        4004        378      39  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
 20940        3887       3347     207  AKAMAI-ASN1, NL
 39891        3274        188      25  ALJAWWALSTC-AS, SA
 12389        2961       2274     910  ROSTELECOM-AS, RU
  9009        2469        250    1285  M247, GB
 34984        2225        358     604  TELLCOM-AS, TR
 47331        1953        312    1490  TTNET, TR
 58224        1792        929     580  TCI, IR

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       10268       3415     566  Uninet S.A. de C.V., MX
 10620        3458        519     719  Telmex Colombia S.A., CO
 11830        2456        369      62  Instituto Costarricense de Electricidad
 13999        1666        284     474  Mega Cable, S.A. de C.V., MX
  6503        1441        354     524  Axtel, S.A.B. de C.V., MX
 28573        1400       2330     246  CLARO S.A., BR
  3816        1246        651     148  COLOMBIA TELECOMUNICACIONES S.A. ESP, C
 26615        1149       2351     140  TIM SA, BR
  6147        1096        369      21  Telefonica del Peru S.A.A., PE
 11664        1001        191     447  Techtel LMDS Comunicaciones Interactiva

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        1607        393      21  LINKdotNET-AS, EG
 24835        1546        515      32  RAYA-AS, EG
 36992        1299       1518     262  ETISALAT-MISR, EG
 36903        1195        543     114  MT-MPLS, MA
 29571         895         63      57  ORANGE-COTE-IVOIRE, CI
 36935         735        521      39  Vodafone-, EG
  6713         612       1863      34  IAM-AS, MA
 15399         519         50      33  WANANCHI-, KE
 37342         468         32       1  MOVITEL, MZ
 23889         422        232      16  MauritiusTelecom, MU

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       10268       3415     566  Uninet S.A. de C.V., MX
  9808        9059       8886      46  CHINAMOBILE-CN China Mobile Communicati
 12479        6801       1715     152  UNI2-AS, ES
  9121        6745       1692      17  TTNET, TR
 16509        6241      10151    2680  AMAZON-02, US
  7545        5867        788     691  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4681       4192      74  ERX-CERNET-BKB China Education and Rese
 11492        4514        299     785  CABLEONE, US
  8551        4004        378      39  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
 22773        3963       3028     367  ASN-CXA-ALL-CCI-22773-RDC, 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        9059         9013  CHINAMOBILE-CN China Mobile Communications Grou
  9121        6745         6728  TTNET, TR
 12479        6801         6649  UNI2-AS, ES
  7545        5867         5176  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4681         4607  ERX-CERNET-BKB China Education and Research Net
  8551        4004         3965  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
  7155        3902         3872  VIASAT-SP-BACKBONE, US
 11492        4514         3729  CABLEONE, US
 20940        3887         3680  AKAMAI-ASN1, NL
 22773        3963         3596  ASN-CXA-ALL-CCI-22773-RDC, US

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

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

    Bad AS  Designation  Net Originated      Transit AS  Transit AS Name
     46990  UNALLOCATED  8.5.242.0/23              3356  LEVEL3, US
     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            22442  HOU-PHONOSCOPE, US
     54338  UNALLOCATED  8.33.241.0/24             6461  ZAYO-6461, 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
     17033  UNALLOCATED  8.48.225.0/24             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
23.141.0.0/24        Origin:    395350  UNASSIGNED
23.141.0.0/24       Transit:     11426  TWC-11426-CAROLINAS, US
23.252.160.0/24      Origin:    398968  GROUP-IID-01, US
23.252.160.0/24     Transit:       174  COGENT-174, US
23.252.161.0/24      Origin:    398968  GROUP-IID-01, US
23.252.161.0/24     Transit:       174  COGENT-174, US
23.252.163.0/24      Origin:    398968  GROUP-IID-01, US
23.252.163.0/24     Transit:       174  COGENT-174, US
23.252.164.0/24      Origin:    398968  GROUP-IID-01, US
23.252.164.0/24     Transit:       174  COGENT-174, US

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      /10:40      /11:102     /12:305     
/13:590     /14:1204    /15:2034    /16:13577   /17:8355    /18:13897   
/19:25165   /20:43382   /21:52167   /22:108288  /23:95228   /24:523062  
/25:791     /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
  9121        5908        6745  TTNET, TR
 12479        5765        6801  UNI2-AS, ES
  8151        3943       10268  Uninet S.A. de C.V., MX
  8551        3469        4004  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
 11492        3436        4514  CABLEONE, US
  6327        3187        3376  SHAW, CA
  7155        2992        3902  VIASAT-SP-BACKBONE, US
 22773        2956        3963  ASN-CXA-ALL-CCI-22773-RDC, US
 39891        2810        3274  ALJAWWALSTC-AS, SA
 30036        2263        2608  MEDIACOM-ENTERPRISE-BUSINESS, US

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

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

   1:1924      2:996       3:153       4:7         5:3744      6:103    
   7:5         8:1559      9:1        11:172      12:1720     13:415    
  14:2386     15:160      16:39       17:368      18:137      20:167    
  21:4        22:188      23:5486     24:2337     25:6        27:2585   
  29:19       31:2414     32:98       34:1        35:58       36:1734   
  37:3947     38:2518     39:681      40:149      41:3924     42:1058   
  43:2091     44:288      45:15960    46:3885     47:303      49:1639   
  50:1913     51:107      52:1361     53:1        54:293      55:755    
  56:8        57:55       58:1764     59:1165     60:959      61:2266   
  62:2442     63:1938     64:5499     65:2307     66:4901     67:2932   
  68:1177     69:4165     70:1347     71:672      72:3056     74:2630   
  75:1515     76:717      77:2120     78:3810     79:3099     80:1951   
  81:1663     82:1457     83:1194     84:1336     85:3625     86:714    
  87:1952     88:2621     89:3190     90:506      91:7533     92:1886   
  93:2595     94:3262     95:4488     96:1309     97:345      98:988    
  99:862     100:75      101:1032    102:1960    103:28252   104:4137   
 105:463     106:812     107:2459    108:768     109:4182    110:2058   
 111:3258    112:1965    113:1531    114:1535    115:1955    116:1896   
 117:2496    118:2328    119:1827    120:1667    121:1031    122:2543   
 123:2110    124:1611    125:2090    128:1348    129:1201    130:926    
 131:2084    132:760     133:370     134:1925    135:287     136:860    
 137:861     138:2436    139:1221    140:883     141:1354    142:1255   
 143:1443    144:1230    145:344     146:1770    147:1471    148:2218   
 149:1686    150:857     151:1078    152:1825    153:448     154:3591   
 155:1340    156:1878    157:1221    158:1012    159:2044    160:2402   
 161:1301    162:3447    163:1217    164:1662    165:1573    166:633    
 167:1692    168:3703    169:682     170:4335    171:824     172:3002   
 173:3061    174:1024    175:1128    176:3519    177:4603    178:3031   
 179:1994    180:2286    181:2928    182:3243    183:1920    184:2391   
 185:19285   186:4293    187:3573    188:3809    189:3020    190:8841   
 191:1316    192:11033   193:8516    194:6917    195:4983    196:2923   
 197:2359    198:5997    199:6008    200:7507    201:5660    202:10402  
 203:9993    204:4541    205:3357    206:3852    207:3403    208:4009   
 209:4631    210:4235    211:2454    212:3942    213:3378    214:1158   
 215:64      216:6382    217:2652    218:1247    219:600     220:1955   
 221:988     222:857     223:2173   

End of report


More information about the sanog mailing list