[SANOG] Weekly Global IPv4 Routing Table Report

Routing Table Analysis Role Account cscora at apnic.net
Fri Mar 17 18:03:09 UTC 2023


This is an automated weekly mailing describing the state of the Global
IPv4 Routing Table as seen from APNIC's router in Japan.

The posting is sent to APOPS, NANOG, AfNOG, SANOG, PacNOG, SAFNOG
TZNOG, MENOG, BJNOG, SDNOG, CMNOG, LACNOG and the RIPE Routing WG.

Daily listings are sent to bgp-stats at lists.apnic.net.

For historical data, please see https://thyme.apnic.net.

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

IPv4 Routing Table Report   04:00 +10GMT Sat 18 Mar, 2023

  BGP Table (Global) as seen in Japan.

Report Website:     https://thyme.apnic.net
Detailed Analysis:  https://thyme.apnic.net/current/

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

BGP routing table entries examined:                              915803
    Prefixes after maximum aggregation (per Origin AS):          347771
    Deaggregation factor:                                          2.63
    Unique aggregates announced (without unneeded subnets):      446837
Total ASes present in the Internet Routing Table:                 74244
    Prefixes per ASN:                                             12.34
Origin-only ASes present in the Internet Routing Table:           63706
Origin ASes announcing only one prefix:                           26134
Transit ASes present in the Internet Routing Table:               10538
Transit-only ASes present in the Internet Routing Table:            451
Average AS path length visible in the Internet Routing Table:       4.3
    Max AS path length visible:                                      55
    Max AS path prepend of ASN (265020)                              50
Prefixes from unregistered ASNs in the Routing Table:              1100
    Number of instances of unregistered ASNs:                      1115
Number of 32-bit ASNs allocated by the RIRs:                      41464
Number of 32-bit ASNs visible in the Routing Table:               34345
Prefixes from 32-bit ASNs in the Routing Table:                  168511
Number of bogon 32-bit ASNs visible in the Routing Table:            68
Special use prefixes present in the Routing Table:                    1
Prefixes being announced from unallocated address space:            525
Number of addresses announced to Internet:                   3063819264
    Equivalent to 182 /8s, 158 /16s and 44 /24s
    Percentage of available address space announced:               82.8
    Percentage of allocated address space announced:               82.8
    Percentage of available address space allocated:              100.0
    Percentage of address space in use by end-sites:               99.6
Total number of prefixes smaller than registry allocations:      306446

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

Prefixes being announced by APNIC Region ASes:                   241990
    Total APNIC prefixes after maximum aggregation:               69156
    APNIC Deaggregation factor:                                    3.50
Prefixes being announced from the APNIC address blocks:          236593
    Unique aggregates announced from the APNIC address blocks:    97811
APNIC Region origin ASes present in the Internet Routing Table:   13365
    APNIC Prefixes per ASN:                                       17.70
APNIC Region origin ASes announcing only one prefix:               3904
APNIC Region transit ASes present in the Internet Routing Table:   1786
Average APNIC Region AS path length visible:                        4.4
    Max APNIC Region AS path length visible:                         38
Number of APNIC region 32-bit ASNs visible in the Routing Table:   8647
Number of APNIC addresses announced to Internet:              773747584
    Equivalent to 46 /8s, 30 /16s and 115 /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:                    268067
    Total ARIN prefixes after maximum aggregation:               122019
    ARIN Deaggregation factor:                                     2.20
Prefixes being announced from the ARIN address blocks:           270188
    Unique aggregates announced from the ARIN address blocks:    130292
ARIN Region origin ASes present in the Internet Routing Table:    19066
    ARIN Prefixes per ASN:                                        14.17
ARIN Region origin ASes announcing only one prefix:                6963
ARIN Region transit ASes present in the Internet Routing Table:    1963
Average ARIN Region AS path length visible:                         3.7
    Max ARIN Region AS path length visible:                          24
Number of ARIN region 32-bit ASNs visible in the Routing Table:    4758
Number of ARIN addresses announced to Internet:              1286591232
    Equivalent to 76 /8s, 175 /16s and 211 /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:                    257872
    Total RIPE prefixes after maximum aggregation:               121512
    RIPE Deaggregation factor:                                     2.12
Prefixes being announced from the RIPE address blocks:           254293
    Unique aggregates announced from the RIPE address blocks:    157170
RIPE Region origin ASes present in the Internet Routing Table:    28269
    RIPE Prefixes per ASN:                                         9.00
RIPE Region origin ASes announcing only one prefix:               12022
RIPE Region transit ASes present in the Internet Routing Table:    3955
Average RIPE Region AS path length visible:                         4.3
    Max RIPE Region AS path length visible:                          38
Number of RIPE region 32-bit ASNs visible in the Routing Table:   11091
Number of RIPE addresses announced to Internet:               718396288
    Equivalent to 42 /8s, 209 /16s and 219 /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:                  117489
    Total LACNIC prefixes after maximum aggregation:              28509
    LACNIC Deaggregation factor:                                   4.12
Prefixes being announced from the LACNIC address blocks:         116871
    Unique aggregates announced from the LACNIC address blocks:   48990
LACNIC Region origin ASes present in the Internet Routing Table:  10976
    LACNIC Prefixes per ASN:                                      10.65
LACNIC Region origin ASes announcing only one prefix:              2650
LACNIC Region transit ASes present in the Internet Routing Table:  2288
Average LACNIC Region AS path length visible:                       4.9
    Max LACNIC Region AS path length visible:                        55
Number of LACNIC region 32-bit ASNs visible in the Routing Table:  8778
Number of LACNIC addresses announced to Internet:             176575232
    Equivalent to 10 /8s, 134 /16s and 83 /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:                  29285
    Total AfriNIC prefixes after maximum aggregation:              5792
    AfriNIC Deaggregation factor:                                  5.06
Prefixes being announced from the AfriNIC address blocks:         37333
    Unique aggregates announced from the AfriNIC address blocks:  12155
AfriNIC Region origin ASes present in the Internet Routing Table:  1726
    AfriNIC Prefixes per ASN:                                     21.63
AfriNIC Region origin ASes announcing only one prefix:              595
AfriNIC Region transit ASes present in the Internet Routing Table:  334
Average AfriNIC Region AS path length visible:                      4.9
    Max AfriNIC Region AS path length visible:                       40
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 1071
Number of AfriNIC addresses announced to Internet:            108120320
    Equivalent to 6 /8s, 113 /16s and 201 /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        9472       8884      51  CHINAMOBILE-CN China Mobile Communicati
  7545        5759        786     691  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4862       4192      75  ERX-CERNET-BKB China Education and Rese
  7713        3531       1043      65  TELKOMNET-AS-AP PT Telekomunikasi Indon
  7552        3460       1331      21  VIETEL-AS-AP Viettel Group, VN
 45899        3364       1874      95  VNPT-AS-VN VNPT Corp, VN
  9498        2851        499     238  BBIL-AP BHARTI Airtel Ltd., IN
  4766        2555      11251     591  KIXS-AS-KR Korea Telecom, KR
 24560        2361        837     441  AIRTELBROADBAND-AS-AP Bharti Airtel Ltd
 45090        2184       1438      79  TENCENT-NET-AP Shenzhen Tencent Compute

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        8098      10765    2858  AMAZON-02, US
 11492        4530        300     621  CABLEONE, US
  7155        3966        279      45  VIASAT-SP-BACKBONE, US
 22773        3650       3065     299  ASN-CXA-ALL-CCI-22773-RDC, US
  6327        3506       1320      64  SHAW, CA
 16625        3174       1597    2343  AKAMAI-AS, US
   749        3037      50520    2304  DNIC-AS-00749, US
396982        2621       3587     354  GOOGLE-CLOUD-PLATFORM, US
  7018        2558      24118    1564  ATT-INTERNET4, US
 30036        2506        361     490  MEDIACOM-ENTERPRISE-BUSINESS, 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        7067       1705     149  UNI2-AS, ES
 39891        4833        286      59  ALJAWWALSTC-AS, SA
 20940        4042       3399     164  AKAMAI-ASN1, NL
  8551        3887        370      37  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
 12389        2955       2292     912  ROSTELECOM-AS, RU
  9009        2634        250    1382  M247, RO
 34984        2268        359     610  TELLCOM-AS, TR
  6849        2164        339      19  UKRTELNET, UA
 58224        1848        949     545  TCI, IR
 13188        1607        100      27  TRIOLAN, UA

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

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

   ASN  No of nets  /20 equiv  MaxAgg  Description
  8151       11174       3340     584  Uninet S.A. de C.V., MX
 10620        3474        504     880  Telmex Colombia S.A., CO
 13999        2290        373     612  Mega Cable, S.A. de C.V., MX
 11830        2264        369      64  Instituto Costarricense de Electricidad
 28573        1371       2325     248  Claro NXT Telecomunicacoes Ltda, BR
  3816        1301        763     161  COLOMBIA TELECOMUNICACIONES S.A. ESP, C
  6503        1298        339     513  Axtel, S.A.B. de C.V., MX
  6147        1130        370      22  Telefonica del Peru S.A.A., PE
 11664        1100        180     459  Techtel LMDS Comunicaciones Interactiva
 26615        1029       2498      45  TIM SA, BR

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

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

   ASN  No of nets  /20 equiv  MaxAgg  Description
 24863        1564        393      19  LINKdotNET-AS, EG
 24835        1542        533      30  RAYA-AS, EG
 36992        1343       1518     275  ETISALAT-MISR, EG
 36903        1242        550      99  MT-MPLS, MA
 29571        1017         67      53  ORANGE-COTE-IVOIRE, CI
 36935         868        520      42  Vodafone-, EG
  6713         550       1861      34  IAM-AS, MA
 15399         506         54      48  WANANCHI-, KE
 24757         495         73       5  EthioNet-AS, ET
 37342         493         32       1  MOVITEL, MZ

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       11174       3340     584  Uninet S.A. de C.V., MX
  9808        9472       8884      51  CHINAMOBILE-CN China Mobile Communicati
 16509        8098      10765    2858  AMAZON-02, US
 12479        7067       1705     149  UNI2-AS, ES
  7545        5759        786     691  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4862       4192      75  ERX-CERNET-BKB China Education and Rese
 39891        4833        286      59  ALJAWWALSTC-AS, SA
 11492        4530        300     621  CABLEONE, US
 20940        4042       3399     164  AKAMAI-ASN1, NL
  7155        3966        279      45  VIASAT-SP-BACKBONE, 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        9472         9421  CHINAMOBILE-CN China Mobile Communications Grou
 12479        7067         6918  UNI2-AS, ES
 16509        8098         5240  AMAZON-02, US
  7545        5759         5068  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4862         4787  ERX-CERNET-BKB China Education and Research Net
 39891        4833         4774  ALJAWWALSTC-AS, SA
  7155        3966         3921  VIASAT-SP-BACKBONE, US
 11492        4530         3909  CABLEONE, US
 20940        4042         3878  AKAMAI-ASN1, NL
  8551        3887         3850  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo

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

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

    Bad AS  Designation  Net Originated      Transit AS  Transit AS Name
      3507  UNALLOCATED  5.105.166.0/24          213035  AS-SERVERION Serverion B.V.,
     33123  UNALLOCATED  8.10.69.0/24             11168  SCC, US
     12169  UNALLOCATED  8.15.207.0/24            32787  PROLEXIC-TECHNOLOGIES-DDOS-M
     53775  UNALLOCATED  8.20.88.0/24              7029  WINDSTREAM, US
     62828  UNALLOCATED  8.21.130.0/24             3356  LEVEL3, US
    393266  UNALLOCATED  8.23.52.0/24             46887  LIGHTOWER, US
    396894  UNALLOCATED  8.28.201.0/24            46887  LIGHTOWER, US
    394936  UNALLOCATED  8.33.224.0/24            22442  HOU-PHONOSCOPE, US
     54338  UNALLOCATED  8.33.241.0/24             6461  ZAYO-6461, US
     18798  UNALLOCATED  8.40.106.0/24             6461  ZAYO-6461, 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
23.131.185.0/24      Origin:       174  COGENT-174, US
23.131.185.0/24     Transit:      2516  KDDI KDDI CORPORATION, JP
23.131.186.0/24      Origin:       174  COGENT-174, US
23.131.186.0/24     Transit:      2516  KDDI KDDI CORPORATION, JP
23.131.187.0/24      Origin:       174  COGENT-174, US
23.131.187.0/24     Transit:      2516  KDDI KDDI CORPORATION, JP
23.131.188.0/24      Origin:       174  COGENT-174, US
23.131.188.0/24     Transit:      2516  KDDI KDDI CORPORATION, JP
23.136.112.0/24      Origin:     54835  UNASSIGNED
23.136.112.0/24     Transit:     21559  OSNET, PR

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      /10:39      /11:103     /12:299     
/13:579     /14:1201    /15:2042    /16:13482   /17:8275    /18:13848   
/19:25223   /20:44271   /21:51582   /22:109717  /23:97592   /24:546780  
/25:741     /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        6125        7067  UNI2-AS, ES
  8151        5140       11174  Uninet S.A. de C.V., MX
 39891        3632        4833  ALJAWWALSTC-AS, SA
 11492        3438        4530  CABLEONE, US
  8551        3359        3887  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
  6327        3314        3506  SHAW, CA
  7155        3041        3966  VIASAT-SP-BACKBONE, US
 22773        2697        3650  ASN-CXA-ALL-CCI-22773-RDC, US
 30036        2164        2506  MEDIACOM-ENTERPRISE-BUSINESS, US
 10620        2028        3474  Telmex Colombia S.A., CO

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

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

   1:1699      2:1227      3:170       4:5         5:4422      6:118    
   7:6         8:1553      9:1        11:172      12:1575     13:395    
  14:2322     15:296      16:111      17:368      18:401      20:249    
  21:4        22:188      23:6122     24:2505     25:6        27:2492   
  29:19       31:2507     32:104      34:10       35:107      36:1910   
  37:4623     38:4364     39:807      40:150      41:3989     42:966    
  43:2335     44:312      45:16456    46:4247     47:379      49:1752   
  50:1839     51:570      52:1587     54:389      55:867      56:8      
  57:90       58:1750     59:1129     60:972      61:2438     62:2641   
  63:1934     64:5663     65:2317     66:4932     67:3023     68:1365   
  69:4127     70:1268     71:665      72:2973     74:2600     75:1459   
  76:608      77:2427     78:1855     79:3166     80:2064     81:1741   
  82:1503     83:1231     84:1528     85:2998     86:748      87:1959   
  88:1246     89:3621     90:612      91:7672     92:2020     93:2571   
  94:3556     95:3959     96:1327     97:332      98:1165     99:748    
 100:77      101:1070    102:2645    103:31116   104:4604    105:481    
 106:907     107:2553    108:985     109:4388    110:2071    111:3241   
 112:2061    113:1558    114:1629    115:2027    116:1918    117:2542   
 118:2279    119:1979    120:1769    121:1119    122:2596    123:2181   
 124:1621    125:2485    128:1307    129:1069    130:1007    131:2001   
 132:799     133:422     134:1902    135:301     136:867     137:935    
 138:2558    139:1522    140:1202    141:1473    142:1438    143:1502   
 144:1165    145:356     146:1919    147:1565    148:2261    149:1959   
 150:872     151:1147    152:1849    153:488     154:4272    155:1419   
 156:1688    157:1278    158:1053    159:2268    160:2540    161:1474   
 162:3541    163:1505    164:1596    165:1684    166:859     167:1708   
 168:3889    169:933     170:4603    171:888     172:3502    173:2937   
 174:1023    175:1165    176:3682    177:4611    178:3635    179:2184   
 180:2405    181:3416    182:3353    183:1932    184:2351    185:20157  
 186:4681    187:3977    188:4093    189:3594    190:9134    191:1460   
 192:10967   193:8823    194:7254    195:5148    196:3091    197:2387   
 198:5963    199:6096    200:7846    201:5876    202:10760   203:10195  
 204:4626    205:3540    206:3904    207:3457    208:4092    209:4872   
 210:4452    211:2500    212:4093    213:3545    214:1094    215:58     
 216:6597    217:2659    218:1287    219:580     220:2014    221:974    
 222:878     223:2167   

End of report


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