[SANOG] Weekly Global IPv4 Routing Table Report

Routing Table Analysis Role Account cscora at apnic.net
Fri Feb 4 18:03:08 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 05 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:                              887718
    Prefixes after maximum aggregation (per Origin AS):          334257
    Deaggregation factor:                                          2.66
    Unique aggregates announced (without unneeded subnets):      427201
Total ASes present in the Internet Routing Table:                 72732
    Prefixes per ASN:                                             12.21
Origin-only ASes present in the Internet Routing Table:           62417
Origin ASes announcing only one prefix:                           25709
Transit ASes present in the Internet Routing Table:               10315
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:               901
    Number of instances of unregistered ASNs:                       904
Number of 32-bit ASNs allocated by the RIRs:                      38493
Number of 32-bit ASNs visible in the Routing Table:               32029
Prefixes from 32-bit ASNs in the Routing Table:                  149194
Number of bogon 32-bit ASNs visible in the Routing Table:            23
Special use prefixes present in the Routing Table:                    1
Prefixes being announced from unallocated address space:            521
Number of addresses announced to Internet:                   3069178880
    Equivalent to 182 /8s, 239 /16s and 244 /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:      300352

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

Prefixes being announced by APNIC Region ASes:                   233493
    Total APNIC prefixes after maximum aggregation:               65801
    APNIC Deaggregation factor:                                    3.55
Prefixes being announced from the APNIC address blocks:          228328
    Unique aggregates announced from the APNIC address blocks:    94107
APNIC Region origin ASes present in the Internet Routing Table:   12342
    APNIC Prefixes per ASN:                                       18.50
APNIC Region origin ASes announcing only one prefix:               3527
APNIC Region transit ASes present in the Internet Routing Table:   1722
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:   7528
Number of APNIC addresses announced to Internet:              774726272
    Equivalent to 46 /8s, 45 /16s and 98 /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:                    258125
    Total ARIN prefixes after maximum aggregation:               118895
    ARIN Deaggregation factor:                                     2.17
Prefixes being announced from the ARIN address blocks:           258153
    Unique aggregates announced from the ARIN address blocks:    123285
ARIN Region origin ASes present in the Internet Routing Table:    18943
    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:    1954
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:    4327
Number of ARIN addresses announced to Internet:              1295979520
    Equivalent to 77 /8s, 63 /16s and 20 /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:                    253216
    Total RIPE prefixes after maximum aggregation:               116221
    RIPE Deaggregation factor:                                     2.18
Prefixes being announced from the RIPE address blocks:           249643
    Unique aggregates announced from the RIPE address blocks:    148914
RIPE Region origin ASes present in the Internet Routing Table:    28172
    RIPE Prefixes per ASN:                                         8.86
RIPE Region origin ASes announcing only one prefix:               12129
RIPE Region transit ASes present in the Internet Routing Table:    3967
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:   10630
Number of RIPE addresses announced to Internet:               713358208
    Equivalent to 42 /8s, 132 /16s and 251 /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:                  114401
    Total LACNIC prefixes after maximum aggregation:              27310
    LACNIC Deaggregation factor:                                   4.19
Prefixes being announced from the LACNIC address blocks:         115123
    Unique aggregates announced from the LACNIC address blocks:   48569
LACNIC Region origin ASes present in the Internet Routing Table:  10937
    LACNIC Prefixes per ASN:                                      10.53
LACNIC Region origin ASes announcing only one prefix:              2652
LACNIC Region transit ASes present in the Internet Routing Table:  2191
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:  8622
Number of LACNIC addresses announced to Internet:             176621056
    Equivalent to 10 /8s, 135 /16s and 6 /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:                  27582
    Total AfriNIC prefixes after maximum aggregation:              5352
    AfriNIC Deaggregation factor:                                  5.15
Prefixes being announced from the AfriNIC address blocks:         35950
    Unique aggregates announced from the AfriNIC address blocks:  11864
AfriNIC Region origin ASes present in the Internet Routing Table:  1588
    AfriNIC Prefixes per ASN:                                     22.64
AfriNIC Region origin ASes announcing only one prefix:              549
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:  922
Number of AfriNIC addresses announced to Internet:            108166912
    Equivalent to 6 /8s, 114 /16s and 127 /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        9057       8886      46  CHINAMOBILE-CN China Mobile Communicati
  7545        5865        788     693  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        3483       1038      51  TELKOMNET-AS-AP PT Telekomunikasi Indon
 45899        3434       1880      57  VNPT-AS-VN VNPT Corp, VN
  4766        2541      11122     618  KIXS-AS-KR Korea Telecom, KR
  9498        2315        475     235  BBIL-AP BHARTI Airtel Ltd., IN
 45090        2170       1438      79  TENCENT-NET-AP Shenzhen Tencent Compute
  4755        2117        429     199  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        6222      10151    2650  AMAZON-02, US
 11492        4464        296     845  CABLEONE, US
 22773        3968       3028     368  ASN-CXA-ALL-CCI-22773-RDC, US
  7155        3903        264      30  VIASAT-SP-BACKBONE, US
 16625        3657       1887    2563  AKAMAI-AS, US
  6327        3366       1318      63  SHAW, CA
   749        2887      50780    2143  DNIC-AS-00749, US
 30036        2608        374     142  MEDIACOM-ENTERPRISE-BUSINESS, US
   209        2521       4962     427  CENTURYLINK-US-LEGACY-QWEST, US
 20115        2249       3035     508  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        6809       1720     154  UNI2-AS, ES
  9121        6692       1692      17  TTNET, TR
  8551        4004        378      39  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
 20940        3882       3347     210  AKAMAI-ASN1, NL
 39891        3274        188      25  ALJAWWALSTC-AS, SA
 12389        2955       2274     906  ROSTELECOM-AS, RU
  9009        2474        250    1285  M247, GB
 34984        2218        357     602  TELLCOM-AS, TR
 47331        1953        312    1490  TTNET, TR
 58224        1789        928     582  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       10617       3434     566  Uninet S.A. de C.V., MX
 10620        3454        518     721  Telmex Colombia S.A., CO
 11830        2460        369      62  Instituto Costarricense de Electricidad
 13999        1662        284     469  Mega Cable, S.A. de C.V., MX
  6503        1441        354     524  Axtel, S.A.B. de C.V., MX
 28573        1404       2331     247  CLARO S.A., BR
  3816        1248        659     145  COLOMBIA TELECOMUNICACIONES S.A. ESP, C
 26615        1136       2350     139  TIM SA, BR
  6147        1095        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        1605        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         518         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       10617       3434     566  Uninet S.A. de C.V., MX
  9808        9057       8886      46  CHINAMOBILE-CN China Mobile Communicati
 12479        6809       1720     154  UNI2-AS, ES
  9121        6692       1692      17  TTNET, TR
 16509        6222      10151    2650  AMAZON-02, US
  7545        5865        788     693  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4682       4192      74  ERX-CERNET-BKB China Education and Rese
 11492        4464        296     845  CABLEONE, US
  8551        4004        378      39  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
 22773        3968       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        9057         9011  CHINAMOBILE-CN China Mobile Communications Grou
  9121        6692         6675  TTNET, TR
 12479        6809         6655  UNI2-AS, ES
  7545        5865         5172  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4682         4608  ERX-CERNET-BKB China Education and Research Net
  8551        4004         3965  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
  7155        3903         3873  VIASAT-SP-BACKBONE, US
 20940        3882         3672  AKAMAI-ASN1, NL
 11492        4464         3619  CABLEONE, US
 22773        3968         3600  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     
/13:591     /14:1206    /15:2033    /16:13582   /17:8351    /18:13887   
/19:25149   /20:43356   /21:52014   /22:108148  /23:95427   /24:522707  
/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        5863        6692  TTNET, TR
 12479        5767        6809  UNI2-AS, ES
  8151        4344       10617  Uninet S.A. de C.V., MX
  8551        3469        4004  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
 11492        3414        4464  CABLEONE, US
  6327        3177        3366  SHAW, CA
  7155        2993        3903  VIASAT-SP-BACKBONE, US
 22773        2958        3968  ASN-CXA-ALL-CCI-22773-RDC, US
 39891        2810        3274  ALJAWWALSTC-AS, SA
 30036        2264        2608  MEDIACOM-ENTERPRISE-BUSINESS, US

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

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

   1:1918      2:1004      3:153       4:7         5:3739      6:103    
   7:5         8:1556      9:1        11:172      12:1709     13:415    
  14:2379     15:156      16:39       17:372      18:139      20:166    
  21:4        22:188      23:5454     24:2318     25:6        27:2592   
  29:19       31:2404     32:98       34:1        35:55       36:1733   
  37:3939     38:2511     39:675      40:149      41:3881     42:1057   
  43:2090     44:292      45:15990    46:3866     47:303      49:1634   
  50:1903     51:106      52:1353     53:1        54:293      55:747    
  56:8        57:55       58:1767     59:1151     60:958      61:2264   
  62:2435     63:1942     64:5484     65:2304     66:4894     67:2929   
  68:1177     69:4161     70:1345     71:672      72:3056     74:2627   
  75:1516     76:716      77:2125     78:3802     79:3096     80:1942   
  81:1662     82:1455     83:1198     84:1318     85:3615     86:711    
  87:1952     88:2611     89:3146     90:505      91:7534     92:1880   
  93:2596     94:3253     95:4485     96:1308     97:345      98:991    
  99:864     100:75      101:1049    102:1939    103:28154   104:4107   
 105:462     106:831     107:2461    108:769     109:4178    110:2070   
 111:3258    112:1967    113:1531    114:1536    115:1951    116:1907   
 117:2503    118:2330    119:1827    120:1668    121:1028    122:2542   
 123:2112    124:1609    125:2086    128:1350    129:1195    130:919    
 131:2094    132:757     133:367     134:1931    135:289     136:857    
 137:858     138:2466    139:1217    140:880     141:1340    142:1251   
 143:1434    144:1230    145:342     146:1753    147:1470    148:2218   
 149:1670    150:849     151:1077    152:1818    153:448     154:3642   
 155:1333    156:1867    157:1218    158:1010    159:2030    160:2396   
 161:1296    162:3425    163:1211    164:1670    165:1566    166:620    
 167:1688    168:3684    169:689     170:4317    171:824     172:3008   
 173:3050    174:1015    175:1126    176:3512    177:4572    178:3019   
 179:2010    180:2283    181:2900    182:3235    183:1919    184:2390   
 185:19263   186:4290    187:3609    188:3828    189:3188    190:8876   
 191:1322    192:11018   193:8532    194:6942    195:4972    196:2916   
 197:2367    198:5998    199:5996    200:7545    201:5701    202:10455  
 203:10010   204:4521    205:3386    206:3857    207:3378    208:3999   
 209:4616    210:4236    211:2454    212:3938    213:3373    214:1144   
 215:64      216:6361    217:2636    218:1238    219:602     220:1952   
 221:988     222:858     223:2173   

End of report


More information about the sanog mailing list