[SANOG] Weekly Global IPv4 Routing Table Report

Routing Table Analysis Role Account cscora at apnic.net
Fri Jan 28 18:02:52 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 29 Jan, 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:                              887357
    Prefixes after maximum aggregation (per Origin AS):          333907
    Deaggregation factor:                                          2.66
    Unique aggregates announced (without unneeded subnets):      426824
Total ASes present in the Internet Routing Table:                 72715
    Prefixes per ASN:                                             12.20
Origin-only ASes present in the Internet Routing Table:           62389
Origin ASes announcing only one prefix:                           25723
Transit ASes present in the Internet Routing Table:               10326
Transit-only ASes present in the Internet Routing Table:            371
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:               909
    Number of instances of unregistered ASNs:                       912
Number of 32-bit ASNs allocated by the RIRs:                      38417
Number of 32-bit ASNs visible in the Routing Table:               31981
Prefixes from 32-bit ASNs in the Routing Table:                  148775
Number of bogon 32-bit ASNs visible in the Routing Table:            21
Special use prefixes present in the Routing Table:                    1
Prefixes being announced from unallocated address space:            546
Number of addresses announced to Internet:                   3069057792
    Equivalent to 182 /8s, 238 /16s and 27 /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:      300224

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

Prefixes being announced by APNIC Region ASes:                   233500
    Total APNIC prefixes after maximum aggregation:               65661
    APNIC Deaggregation factor:                                    3.56
Prefixes being announced from the APNIC address blocks:          228240
    Unique aggregates announced from the APNIC address blocks:    93955
APNIC Region origin ASes present in the Internet Routing Table:   12316
    APNIC Prefixes per ASN:                                       18.53
APNIC Region origin ASes announcing only one prefix:               3526
APNIC Region transit ASes present in the Internet Routing Table:   1721
Average APNIC Region AS path length visible:                        4.5
    Max APNIC Region AS path length visible:                         29
Number of APNIC region 32-bit ASNs visible in the Routing Table:   7502
Number of APNIC addresses announced to Internet:              774614912
    Equivalent to 46 /8s, 43 /16s and 175 /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:                    258031
    Total ARIN prefixes after maximum aggregation:               118815
    ARIN Deaggregation factor:                                     2.17
Prefixes being announced from the ARIN address blocks:           258096
    Unique aggregates announced from the ARIN address blocks:    123187
ARIN Region origin ASes present in the Internet Routing Table:    18939
    ARIN Prefixes per ASN:                                        13.63
ARIN Region origin ASes announcing only one prefix:                6852
ARIN Region transit ASes present in the Internet Routing Table:    1952
Average ARIN Region AS path length visible:                         3.8
    Max ARIN Region AS path length visible:                          34
Number of ARIN region 32-bit ASNs visible in the Routing Table:    4315
Number of ARIN addresses announced to Internet:              1296013056
    Equivalent to 77 /8s, 63 /16s and 151 /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:                    253075
    Total RIPE prefixes after maximum aggregation:               116101
    RIPE Deaggregation factor:                                     2.18
Prefixes being announced from the RIPE address blocks:           249526
    Unique aggregates announced from the RIPE address blocks:    148747
RIPE Region origin ASes present in the Internet Routing Table:    28182
    RIPE Prefixes per ASN:                                         8.85
RIPE Region origin ASes announcing only one prefix:               12128
RIPE Region transit ASes present in the Internet Routing Table:    3975
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:   10629
Number of RIPE addresses announced to Internet:               713425280
    Equivalent to 42 /8s, 134 /16s and 1 /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:                  114313
    Total LACNIC prefixes after maximum aggregation:              27288
    LACNIC Deaggregation factor:                                   4.19
Prefixes being announced from the LACNIC address blocks:         115028
    Unique aggregates announced from the LACNIC address blocks:   48529
LACNIC Region origin ASes present in the Internet Routing Table:  10935
    LACNIC Prefixes per ASN:                                      10.52
LACNIC Region origin ASes announcing only one prefix:              2670
LACNIC Region transit ASes present in the Internet Routing Table:  2201
Average LACNIC Region AS path length visible:                       5.0
    Max LACNIC Region AS path length visible:                        53
Number of LACNIC region 32-bit ASNs visible in the Routing Table:  8617
Number of LACNIC addresses announced to Internet:             176482048
    Equivalent to 10 /8s, 132 /16s and 231 /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:                  27529
    Total AfriNIC prefixes after maximum aggregation:              5357
    AfriNIC Deaggregation factor:                                  5.14
Prefixes being announced from the AfriNIC address blocks:         35921
    Unique aggregates announced from the AfriNIC address blocks:  11921
AfriNIC Region origin ASes present in the Internet Routing Table:  1585
    AfriNIC Prefixes per ASN:                                     22.66
AfriNIC Region origin ASes announcing only one prefix:              547
AfriNIC Region transit ASes present in the Internet Routing Table:  309
Average AfriNIC Region AS path length visible:                      5.1
    Max AfriNIC Region AS path length visible:                       42
Number of AfriNIC region 32-bit ASNs visible in the Routing Table:  918
Number of AfriNIC addresses announced to Internet:            108177664
    Equivalent to 6 /8s, 114 /16s and 169 /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        9058       8886      46  CHINAMOBILE-CN China Mobile Communicati
  7545        5859        788     690  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4682       4192      74  ERX-CERNET-BKB China Education and Rese
  7552        3606       1330      20  VIETEL-AS-AP Viettel Group, VN
  7713        3480       1038      51  TELKOMNET-AS-AP PT Telekomunikasi Indon
 45899        3433       1880      57  VNPT-AS-VN VNPT Corp, VN
  4766        2529      11121     609  KIXS-AS-KR Korea Telecom, KR
  9498        2273        475     232  BBIL-AP BHARTI Airtel Ltd., IN
 45090        2170       1438      79  TENCENT-NET-AP Shenzhen Tencent Compute
  4755        2118        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        6158      10142    2617  AMAZON-02, US
 11492        4517        299     789  CABLEONE, US
 22773        3989       3028     368  ASN-CXA-ALL-CCI-22773-RDC, US
  7155        3951        264      30  VIASAT-SP-BACKBONE, US
 16625        3662       1890    2566  AKAMAI-AS, US
  6327        3360       1318      63  SHAW, CA
   749        2887      50780    2143  DNIC-AS-00749, US
 30036        2612        374     131  MEDIACOM-ENTERPRISE-BUSINESS, US
   209        2506       4962     428  CENTURYLINK-US-LEGACY-QWEST, US
 20115        2248       3035     507  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        6789       1718     153  UNI2-AS, ES
  9121        6704       1692      17  TTNET, TR
  8551        4001        378      39  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
 20940        3878       3347     210  AKAMAI-ASN1, NL
 39891        3274        188      25  ALJAWWALSTC-AS, SA
 12389        2956       2290     906  ROSTELECOM-AS, RU
  9009        2509        258    1305  M247, GB
 34984        2220        357     603  TELLCOM-AS, TR
 47331        1963        313    1495  TTNET, TR
 58224        1788        927     583  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       10738       3410     571  Uninet S.A. de C.V., MX
 10620        3457        520     705  Telmex Colombia S.A., CO
 11830        2458        369      62  Instituto Costarricense de Electricidad
 13999        1650        283     468  Mega Cable, S.A. de C.V., MX
  6503        1440        354     524  Axtel, S.A.B. de C.V., MX
 28573        1399       2328     253  CLARO S.A., BR
  3816        1247        658     147  COLOMBIA TELECOMUNICACIONES S.A. ESP, C
 26615        1135       2350     139  TIM SA, BR
  6147        1094        369      21  Telefonica del Peru S.A.A., PE
 11664        1001        191     448  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        1624        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         876         63      60  ORANGE-COTE-IVOIRE, CI
 36935         736        521      39  Vodafone-, EG
  6713         612       1863      34  IAM-AS, MA
 15399         518         50      33  WANANCHI-, KE
 37342         468         32       1  MOVITEL, MZ
 23889         428        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       10738       3410     571  Uninet S.A. de C.V., MX
  9808        9058       8886      46  CHINAMOBILE-CN China Mobile Communicati
 12479        6789       1718     153  UNI2-AS, ES
  9121        6704       1692      17  TTNET, TR
 16509        6158      10142    2617  AMAZON-02, US
  7545        5859        788     690  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4682       4192      74  ERX-CERNET-BKB China Education and Rese
 11492        4517        299     789  CABLEONE, US
  8551        4001        378      39  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
 22773        3989       3028     368  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        9058         9012  CHINAMOBILE-CN China Mobile Communications Grou
  9121        6704         6687  TTNET, TR
 12479        6789         6636  UNI2-AS, ES
  7545        5859         5169  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4682         4608  ERX-CERNET-BKB China Education and Research Net
  8551        4001         3962  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
  7155        3951         3921  VIASAT-SP-BACKBONE, US
 11492        4517         3728  CABLEONE, US
 20940        3878         3668  AKAMAI-ASN1, NL
 22773        3989         3621  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
     32848  UNALLOCATED  8.28.72.0/24              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

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
23.131.24.0/24       Origin:     62997  RICKEY-S-FRANCIS-JR, US
23.131.24.0/24      Transit:      6939  HURRICANE, US
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

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     
/13:591     /14:1207    /15:2033    /16:13583   /17:8345    /18:13867   
/19:25131   /20:43322   /21:51998   /22:108331  /23:95395   /24:522290  
/25:788     /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        5879        6704  TTNET, TR
 12479        5745        6789  UNI2-AS, ES
  8151        4574       10738  Uninet S.A. de C.V., MX
  8551        3466        4001  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
 11492        3443        4517  CABLEONE, US
  6327        3171        3360  SHAW, CA
  7155        3041        3951  VIASAT-SP-BACKBONE, US
 22773        2981        3989  ASN-CXA-ALL-CCI-22773-RDC, US
 39891        2810        3274  ALJAWWALSTC-AS, SA
 30036        2267        2612  MEDIACOM-ENTERPRISE-BUSINESS, US

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

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

   1:1918      2:1004      3:153       4:7         5:3719      6:103    
   7:5         8:1551      9:1        11:172      12:1707     13:408    
  14:2375     15:154      16:39       17:374      18:131      20:167    
  21:4        22:188      23:5423     24:2335     25:6        27:2594   
  29:19       31:2408     32:104      34:1        35:52       36:1731   
  37:3941     38:2508     39:719      40:149      41:3895     42:1062   
  43:2082     44:293      45:15996    46:3867     47:303      49:1636   
  50:1900     51:107      52:1344     54:293      55:733      56:8      
  57:55       58:1769     59:1142     60:960      61:2261     62:2431   
  63:1948     64:5352     65:2312     66:4906     67:2925     68:1182   
  69:4164     70:1343     71:673      72:3063     74:2634     75:1515   
  76:715      77:2136     78:3810     79:3102     80:1931     81:1660   
  82:1459     83:1197     84:1323     85:3564     86:706      87:1887   
  88:2626     89:3135     90:496      91:7518     92:1896     93:2596   
  94:3245     95:4490     96:1314     97:345      98:993      99:863    
 100:75      101:1048    102:1916    103:28097   104:4119    105:462    
 106:848     107:2461    108:761     109:4187    110:2053    111:3259   
 112:1968    113:1532    114:1533    115:1955    116:1888    117:2503   
 118:2323    119:1835    120:1669    121:1028    122:2542    123:2114   
 124:1608    125:2071    128:1354    129:1197    130:918     131:2090   
 132:758     133:367     134:1940    135:290     136:854     137:855    
 138:2459    139:1214    140:879     141:1346    142:1249    143:1436   
 144:1230    145:335     146:1757    147:1479    148:2212    149:1662   
 150:846     151:1085    152:1819    153:447     154:3698    155:1366   
 156:1858    157:1220    158:1010    159:2021    160:2388    161:1292   
 162:3420    163:1206    164:1675    165:1546    166:622     167:1685   
 168:3672    169:691     170:4311    171:824     172:3016    173:3045   
 174:1018    175:1127    176:3509    177:4569    178:3034    179:1959   
 180:2285    181:2857    182:3229    183:1919    184:2400    185:19262  
 186:4278    187:3577    188:3795    189:3249    190:8910    191:1311   
 192:11000   193:8511    194:6948    195:4969    196:2916    197:2373   
 198:5994    199:6003    200:7475    201:5738    202:10463   203:10016  
 204:4527    205:3391    206:3833    207:3395    208:3995    209:4614   
 210:4230    211:2453    212:3938    213:3385    214:1156    215:64     
 216:6362    217:2617    218:1235    219:602     220:1948    221:989    
 222:858     223:2174   

End of report


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