[SANOG] Weekly Global IPv4 Routing Table Report

Routing Table Analysis Role Account cscora at apnic.net
Fri Jan 20 18:03:12 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 21 Jan, 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:                              919460
    Prefixes after maximum aggregation (per Origin AS):          347315
    Deaggregation factor:                                          2.65
    Unique aggregates announced (without unneeded subnets):      444984
Total ASes present in the Internet Routing Table:                 74112
    Prefixes per ASN:                                             12.41
Origin-only ASes present in the Internet Routing Table:           63597
Origin ASes announcing only one prefix:                           26170
Transit ASes present in the Internet Routing Table:               10515
Transit-only ASes present in the Internet Routing Table:            430
Average AS path length visible in the Internet Routing Table:       4.2
    Max AS path length visible:                                      55
    Max AS path prepend of ASN (265020)                              50
Prefixes from unregistered ASNs in the Routing Table:               953
    Number of instances of unregistered ASNs:                       962
Number of 32-bit ASNs allocated by the RIRs:                      41079
Number of 32-bit ASNs visible in the Routing Table:               34073
Prefixes from 32-bit ASNs in the Routing Table:                  166405
Number of bogon 32-bit ASNs visible in the Routing Table:            29
Special use prefixes present in the Routing Table:                    1
Prefixes being announced from unallocated address space:            502
Number of addresses announced to Internet:                   3063801088
    Equivalent to 182 /8s, 157 /16s and 229 /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:      312168

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

Prefixes being announced by APNIC Region ASes:                   240538
    Total APNIC prefixes after maximum aggregation:               68701
    APNIC Deaggregation factor:                                    3.50
Prefixes being announced from the APNIC address blocks:          235601
    Unique aggregates announced from the APNIC address blocks:    97720
APNIC Region origin ASes present in the Internet Routing Table:   13254
    APNIC Prefixes per ASN:                                       17.78
APNIC Region origin ASes announcing only one prefix:               3844
APNIC Region transit ASes present in the Internet Routing Table:   1775
Average APNIC Region AS path length visible:                        4.5
    Max APNIC Region AS path length visible:                         27
Number of APNIC region 32-bit ASNs visible in the Routing Table:   8514
Number of APNIC addresses announced to Internet:              773715072
    Equivalent to 46 /8s, 29 /16s and 244 /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:                    267202
    Total ARIN prefixes after maximum aggregation:               121273
    ARIN Deaggregation factor:                                     2.20
Prefixes being announced from the ARIN address blocks:           269209
    Unique aggregates announced from the ARIN address blocks:    129792
ARIN Region origin ASes present in the Internet Routing Table:    19076
    ARIN Prefixes per ASN:                                        14.11
ARIN Region origin ASes announcing only one prefix:                6986
ARIN Region transit ASes present in the Internet Routing Table:    1962
Average ARIN Region AS path length visible:                         3.7
    Max ARIN Region AS path length visible:                          35
Number of ARIN region 32-bit ASNs visible in the Routing Table:    4732
Number of ARIN addresses announced to Internet:              1286338048
    Equivalent to 76 /8s, 171 /16s and 246 /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:                    264243
    Total RIPE prefixes after maximum aggregation:               122408
    RIPE Deaggregation factor:                                     2.16
Prefixes being announced from the RIPE address blocks:           260620
    Unique aggregates announced from the RIPE address blocks:    156066
RIPE Region origin ASes present in the Internet Routing Table:    28257
    RIPE Prefixes per ASN:                                         9.22
RIPE Region origin ASes announcing only one prefix:               12065
RIPE Region transit ASes present in the Internet Routing Table:    3969
Average RIPE Region AS path length visible:                         4.2
    Max RIPE Region AS path length visible:                          34
Number of RIPE region 32-bit ASNs visible in the Routing Table:   11001
Number of RIPE addresses announced to Internet:               719149696
    Equivalent to 42 /8s, 221 /16s and 90 /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:                  117563
    Total LACNIC prefixes after maximum aggregation:              28462
    LACNIC Deaggregation factor:                                   4.13
Prefixes being announced from the LACNIC address blocks:         116740
    Unique aggregates announced from the LACNIC address blocks:   48999
LACNIC Region origin ASes present in the Internet Routing Table:  11002
    LACNIC Prefixes per ASN:                                      10.61
LACNIC Region origin ASes announcing only one prefix:              2683
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:  8771
Number of LACNIC addresses announced to Internet:             176187136
    Equivalent to 10 /8s, 128 /16s and 103 /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:                  28961
    Total AfriNIC prefixes after maximum aggregation:              5728
    AfriNIC Deaggregation factor:                                  5.06
Prefixes being announced from the AfriNIC address blocks:         36788
    Unique aggregates announced from the AfriNIC address blocks:  11999
AfriNIC Region origin ASes present in the Internet Routing Table:  1711
    AfriNIC Prefixes per ASN:                                     21.50
AfriNIC Region origin ASes announcing only one prefix:              592
AfriNIC Region transit ASes present in the Internet Routing Table:  328
Average AfriNIC Region AS path length visible:                      4.9
    Max AfriNIC Region AS path length visible:                       30
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 1055
Number of AfriNIC addresses announced to Internet:            108122624
    Equivalent to 6 /8s, 113 /16s and 210 /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        9446       8884      50  CHINAMOBILE-CN China Mobile Communicati
  7545        5945        787     703  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4863       4192      75  ERX-CERNET-BKB China Education and Rese
  7552        3632       1331      21  VIETEL-AS-AP Viettel Group, VN
  7713        3506       1043      63  TELKOMNET-AS-AP PT Telekomunikasi Indon
 45899        3382       1874      96  VNPT-AS-VN VNPT Corp, VN
  9498        2711        499     238  BBIL-AP BHARTI Airtel Ltd., IN
  4766        2531      11251     593  KIXS-AS-KR Korea Telecom, KR
 24560        2360        849     436  AIRTELBROADBAND-AS-AP Bharti Airtel Ltd
 45090        2183       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        7809      10710    2912  AMAZON-02, US
 11492        4530        300     601  CABLEONE, US
  7155        3895        265      33  VIASAT-SP-BACKBONE, US
 22773        3693       3066     323  ASN-CXA-ALL-CCI-22773-RDC, US
  6327        3499       1320      63  SHAW, CA
 16625        3468       1789    2513  AKAMAI-AS, US
   749        3024      50575    2291  DNIC-AS-00749, US
  7018        2586      24126    1562  ATT-INTERNET4, US
396982        2580       3494     369  GOOGLE-CLOUD-PLATFORM, US
 30036        2570        368     356  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        6966       1705     145  UNI2-AS, ES
  9121        6117       1692      17  TTNET, TR
 39891        4557        269      60  ALJAWWALSTC-AS, SA
 20940        4055       3399     179  AKAMAI-ASN1, NL
  8551        3905        374      38  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
 12389        2941       2290     908  ROSTELECOM-AS, RU
 47331        2792        411    2100  TTNET, TR
  9009        2686        255    1361  M247, RO
 34984        2253        358     609  TELLCOM-AS, TR
  6849        2195        339      20  UKRTELNET, 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       11032       3340     585  Uninet S.A. de C.V., MX
 10620        3472        507     854  Telmex Colombia S.A., CO
 11830        2261        369      64  Instituto Costarricense de Electricidad
 13999        2221        366     594  Mega Cable, S.A. de C.V., MX
 28573        1350       2329     257  Claro NXT Telecomunicacoes Ltda, BR
  6503        1297        339     517  Axtel, S.A.B. de C.V., MX
  3816        1292        742     157  COLOMBIA TELECOMUNICACIONES S.A. ESP, C
  6147        1151        369      22  Telefonica del Peru S.A.A., PE
 11664        1136        186     465  Techtel LMDS Comunicaciones Interactiva
 26615        1007       2466      43  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
 24835        1544        533      30  RAYA-AS, EG
 24863        1503        393      21  LINKdotNET-AS, EG
 36992        1332       1517     277  ETISALAT-MISR, EG
 36903        1242        550      99  MT-MPLS, MA
 29571        1004         67      46  ORANGE-COTE-IVOIRE, CI
 36935         885        520      42  Vodafone-, EG
  6713         611       1861      34  IAM-AS, MA
 15399         527         54      45  WANANCHI-, KE
 24757         494         73       5  EthioNet-AS, ET
 37342         494         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       11032       3340     585  Uninet S.A. de C.V., MX
  9808        9446       8884      50  CHINAMOBILE-CN China Mobile Communicati
 16509        7809      10710    2912  AMAZON-02, US
 12479        6966       1705     145  UNI2-AS, ES
  9121        6117       1692      17  TTNET, TR
  7545        5945        787     703  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4863       4192      75  ERX-CERNET-BKB China Education and Rese
 39891        4557        269      60  ALJAWWALSTC-AS, SA
 11492        4530        300     601  CABLEONE, US
 20940        4055       3399     179  AKAMAI-ASN1, NL

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

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

   ASN  No of nets  Net Savings  Description
  9808        9446         9396  CHINAMOBILE-CN China Mobile Communications Grou
 12479        6966         6821  UNI2-AS, ES
  9121        6117         6100  TTNET, TR
  7545        5945         5242  TPG-INTERNET-AP TPG Telecom Limited, AU
 16509        7809         4897  AMAZON-02, US
  4538        4863         4788  ERX-CERNET-BKB China Education and Research Net
 39891        4557         4497  ALJAWWALSTC-AS, SA
 11492        4530         3929  CABLEONE, US
 20940        4055         3876  AKAMAI-ASN1, NL
  8551        3905         3867  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
    398083  UNALLOCATED  5.133.124.0/24          399587  UT, US
     33123  UNALLOCATED  8.10.69.0/24             11168  SCC, US
     16641  UNALLOCATED  8.10.194.0/24             3356  LEVEL3, US
     16641  UNALLOCATED  8.10.210.0/24             3356  LEVEL3, US
     25674  UNALLOCATED  8.12.76.0/24              3356  LEVEL3, US
     16641  UNALLOCATED  8.12.250.0/24             3356  LEVEL3, US
     25674  UNALLOCATED  8.14.115.0/24             3356  LEVEL3, US
     12169  UNALLOCATED  8.15.207.0/24            32787  PROLEXIC-TECHNOLOGIES-DDOS-M
     25674  UNALLOCATED  8.19.146.0/24             3356  LEVEL3, US
     53775  UNALLOCATED  8.20.88.0/24              7029  WINDSTREAM, 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      /11:101     /12:295     
/13:582     /14:1201    /15:2039    /16:13491   /17:8321    /18:13921   
/19:25219   /20:44355   /21:52331   /22:110280  /23:98380   /24:548060  
/25:816     /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        6033        6966  UNI2-AS, ES
  9121        5296        6117  TTNET, TR
  8151        5046       11032  Uninet S.A. de C.V., MX
 39891        3548        4557  ALJAWWALSTC-AS, SA
 11492        3445        4530  CABLEONE, US
  8551        3370        3905  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
  6327        3307        3499  SHAW, CA
  7155        2984        3895  VIASAT-SP-BACKBONE, US
 22773        2725        3693  ASN-CXA-ALL-CCI-22773-RDC, US
 47331        2413        2792  TTNET, TR

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

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

   1:1641      2:1236      3:168       4:5         5:4110      6:110    
   7:5         8:1562      9:1        11:172      12:1586     13:373    
  14:2372     15:286      16:79       17:371      18:421      20:243    
  21:4        22:188      23:6064     24:2488     25:4        27:2650   
  29:19       31:2500     32:99       34:9        35:106      36:1875   
  37:4600     38:4020     39:833      40:155      41:3957     42:1055   
  43:2318     44:303      45:16362    46:4196     47:382      49:1744   
  50:1929     51:379      52:1546     54:394      55:860      56:8      
  57:77       58:1745     59:1165     60:1007     61:2423     62:2623   
  63:1939     64:5658     65:2319     66:4909     67:3050     68:1345   
  69:4142     70:1254     71:661      72:2980     74:2592     75:1464   
  76:597      77:2386     78:3951     79:3167     80:2071     81:1828   
  82:1481     83:1233     84:1523     85:3716     86:746      87:1933   
  88:2885     89:3542     90:591      91:7631     92:1988     93:2592   
  94:3526     95:4863     96:1328     97:346      98:1163     99:740    
 100:75      101:1061    102:2511    103:30877   104:4595    105:483    
 106:847     107:2537    108:921     109:4356    110:2081    111:3339   
 112:2046    113:1556    114:1615    115:2042    116:1902    117:2562   
 118:2286    119:1912    120:1765    121:1114    122:2591    123:2156   
 124:1601    125:2351    128:1308    129:1062    130:967     131:1999   
 132:800     133:406     134:1907    135:298     136:886     137:927    
 138:2565    139:1546    140:1042    141:1485    142:1413    143:1481   
 144:1194    145:349     146:1854    147:1551    148:2293    149:1879   
 150:862     151:1135    152:1832    153:478     154:3932    155:1402   
 156:1655    157:1298    158:1048    159:2264    160:2557    161:1425   
 162:3523    163:1480    164:1612    165:1651    166:832     167:1742   
 168:3867    169:918     170:4582    171:886     172:3506    173:3000   
 174:1023    175:1159    176:3700    177:4748    178:3552    179:2152   
 180:2377    181:3376    182:3278    183:1932    184:2342    185:19977  
 186:4650    187:3925    188:4104    189:3497    190:9054    191:1428   
 192:10944   193:8825    194:7215    195:5117    196:3015    197:2408   
 198:5996    199:6094    200:7744    201:5858    202:10643   203:10040  
 204:4609    205:3519    206:3859    207:3421    208:4083    209:4817   
 210:4434    211:2503    212:4086    213:3567    214:1091    215:55     
 216:6610    217:2630    218:1279    219:567     220:2034    221:969    
 222:845     223:2060   

End of report


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