[SANOG] Weekly Global IPv4 Routing Table Report

Routing Table Analysis Role Account cscora at apnic.net
Fri Nov 3 18:02:09 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
UKNOF, 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 04 Nov, 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:                              933958
    Prefixes after maximum aggregation (per Origin AS):          355729
    Deaggregation factor:                                          2.63
    Unique aggregates announced (without unneeded subnets):      454391
Total ASes present in the Internet Routing Table:                 74997
    Prefixes per ASN:                                             12.45
Origin-only ASes present in the Internet Routing Table:           64330
Origin ASes announcing only one prefix:                           26473
Transit ASes present in the Internet Routing Table:               10667
Transit-only ASes present in the Internet Routing Table:            479
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:              1030
    Number of instances of unregistered ASNs:                      1032
Number of 32-bit ASNs allocated by the RIRs:                      43001
Number of 32-bit ASNs visible in the Routing Table:               35319
Prefixes from 32-bit ASNs in the Routing Table:                  177112
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:            516
Number of addresses announced to Internet:                   3050674432
    Equivalent to 181 /8s, 213 /16s and 153 /24s
    Percentage of available address space announced:               82.4
    Percentage of allocated address space announced:               82.4
    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:      310611

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

Prefixes being announced by APNIC Region ASes:                   248049
    Total APNIC prefixes after maximum aggregation:               71480
    APNIC Deaggregation factor:                                    3.47
Prefixes being announced from the APNIC address blocks:          241295
    Unique aggregates announced from the APNIC address blocks:    98869
APNIC Region origin ASes present in the Internet Routing Table:   13723
    APNIC Prefixes per ASN:                                       17.58
APNIC Region origin ASes announcing only one prefix:               4116
APNIC Region transit ASes present in the Internet Routing Table:   1840
Average APNIC Region AS path length visible:                        4.4
    Max APNIC Region AS path length visible:                         32
Number of APNIC region 32-bit ASNs visible in the Routing Table:   9056
Number of APNIC addresses announced to Internet:              772209024
    Equivalent to 46 /8s, 6 /16s and 249 /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, 131072-153913
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:                    273561
    Total ARIN prefixes after maximum aggregation:               124401
    ARIN Deaggregation factor:                                     2.20
Prefixes being announced from the ARIN address blocks:           277878
    Unique aggregates announced from the ARIN address blocks:    132392
ARIN Region origin ASes present in the Internet Routing Table:    19082
    ARIN Prefixes per ASN:                                        14.56
ARIN Region origin ASes announcing only one prefix:                6963
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:                          25
Number of ARIN region 32-bit ASNs visible in the Routing Table:    4824
Number of ARIN addresses announced to Internet:              1277094656
    Equivalent to 76 /8s, 30 /16s and 235 /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:                    262031
    Total RIPE prefixes after maximum aggregation:               124521
    RIPE Deaggregation factor:                                     2.10
Prefixes being announced from the RIPE address blocks:           256837
    Unique aggregates announced from the RIPE address blocks:    160663
RIPE Region origin ASes present in the Internet Routing Table:    28465
    RIPE Prefixes per ASN:                                         9.02
RIPE Region origin ASes announcing only one prefix:               12095
RIPE Region transit ASes present in the Internet Routing Table:    3953
Average RIPE Region AS path length visible:                         4.3
    Max RIPE Region AS path length visible:                          36
Number of RIPE region 32-bit ASNs visible in the Routing Table:   11414
Number of RIPE addresses announced to Internet:               715054464
    Equivalent to 42 /8s, 158 /16s and 221 /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
                       196608-216475
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:                  119225
    Total LACNIC prefixes after maximum aggregation:              28606
    LACNIC Deaggregation factor:                                   4.17
Prefixes being announced from the LACNIC address blocks:         118108
    Unique aggregates announced from the LACNIC address blocks:   49335
LACNIC Region origin ASes present in the Internet Routing Table:  11049
    LACNIC Prefixes per ASN:                                      10.69
LACNIC Region origin ASes announcing only one prefix:              2673
LACNIC Region transit ASes present in the Internet Routing Table:  2353
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:  8880
Number of LACNIC addresses announced to Internet:             178398720
    Equivalent to 10 /8s, 162 /16s and 38 /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:                  30062
    Total AfriNIC prefixes after maximum aggregation:              6005
    AfriNIC Deaggregation factor:                                  5.01
Prefixes being announced from the AfriNIC address blocks:         39324
    Unique aggregates announced from the AfriNIC address blocks:  12702
AfriNIC Region origin ASes present in the Internet Routing Table:  1803
    AfriNIC Prefixes per ASN:                                     21.81
AfriNIC Region origin ASes announcing only one prefix:              626
AfriNIC Region transit ASes present in the Internet Routing Table:  346
Average AfriNIC Region AS path length visible:                      4.9
    Max AfriNIC Region AS path length visible:                       28
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 1145
Number of AfriNIC addresses announced to Internet:            107493632
    Equivalent to 6 /8s, 104 /16s and 57 /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        9552       8730      43  CHINAMOBILE-CN China Mobile Communicati
  7545        5714        785     693  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4920       4192      75  ERX-CERNET-BKB China Education and Rese
 18403        4231        347      25  FPT-AS-AP FPT Telecom Company, VN
  7713        3606       1047      70  TELKOMNET-AS-AP PT Telekomunikasi Indon
 45899        3326       1872      98  VNPT-AS-VN VNPT Corp, VN
  9498        3246        491     240  BBIL-AP BHARTI Airtel Ltd., IN
  7552        2960       1330      20  VIETEL-AS-AP Viettel Group, VN
 24560        2572        851     372  AIRTELBROADBAND-AS-AP Bharti Airtel Ltd
  4766        2536      11270     600  KIXS-AS-KR Korea Telecom, KR

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        9097      11005    3342  AMAZON-02, US
 11492        4540        301     673  CABLEONE, US
  7155        4174        288     100  VIASAT-SP-BACKBONE, US
  6327        3547       1320      67  SHAW, CA
 22773        3515       3055     300  ASN-CXA-ALL-CCI-22773-RDC, US
   749        3139      54923    2391  DNIC-AS-00749, US
   367        3070       3854    1446  DNIC-ASBLK-00306-00371, US
 16625        3042       1385    2302  AKAMAI-AS, US
396982        2710       3598     400  GOOGLE-CLOUD-PLATFORM, US
  7018        2511      23614    1593  ATT-INTERNET4, 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        7405       1713     145  UNI2-AS, ES
 39891        4570        271      54  ALJAWWALSTC-AS, SA
 20940        4026       3397     142  AKAMAI-ASN1, NL
  8551        3443        368      34  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
  9009        3418        296    1596  M247, RO
 12389        2970       2295     915  ROSTELECOM-AS, RU
 34984        2325        361     593  TELLCOM-AS, TR
 58224        1664        913     569  TCI, IR
 13188        1606        100      27  TRIOLAN, UA
  8452        1497       1852      14  TE-AS TE-AS, EG

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       11934       3370     608  UNINET, MX
 10620        3544        504     860  Telmex Colombia S.A., CO
 13999        2423        331     635  Mega Cable, S.A. de C.V., MX
 11830        2005        369      64  Instituto Costarricense de Electricidad
 28573        1331       2322     236  Claro NXT Telecomunicacoes Ltda, BR
  3816        1295        777     196  COLOMBIA TELECOMUNICACIONES S.A. ESP, C
  6503        1250        342     505  Axtel, S.A.B. de C.V., MX
  6147        1101        369      22  Telefonica del Peru S.A.A., PE
 11664        1059        168     431  Techtel LMDS Comunicaciones Interactiva
 26615        1039       2501      51  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        1606        393      19  LINKdotNET-AS, EG
 24835        1549        549      28  RAYA-AS, EG
 36992        1358       1518     280  ETISALAT-MISR, EG
 36903        1248        553      98  MT-MPLS, MA
 29571        1045         67      53  ORANGE-COTE-IVOIRE, CI
 36935         938        521      44  Vodafone-, EG
  6713         552       1861      34  IAM-AS, MA
 15399         520         54      45  WANANCHI-, KE
 37342         494         32       1  MOVITEL, MZ
 24757         480         73       5  EthioNet-AS, ET

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       11934       3370     608  UNINET, MX
  9808        9552       8730      43  CHINAMOBILE-CN China Mobile Communicati
 16509        9097      11005    3342  AMAZON-02, US
 12479        7405       1713     145  UNI2-AS, ES
  7545        5714        785     693  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4920       4192      75  ERX-CERNET-BKB China Education and Rese
 39891        4570        271      54  ALJAWWALSTC-AS, SA
 11492        4540        301     673  CABLEONE, US
 18403        4231        347      25  FPT-AS-AP FPT Telecom Company, VN
  7155        4174        288     100  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        9552         9509  CHINAMOBILE-CN China Mobile Communications Grou
 12479        7405         7260  UNI2-AS, ES
 16509        9097         5755  AMAZON-02, US
  7545        5714         5021  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4920         4845  ERX-CERNET-BKB China Education and Research Net
 39891        4570         4516  ALJAWWALSTC-AS, SA
 18403        4231         4206  FPT-AS-AP FPT Telecom Company, VN
  7155        4174         4074  VIASAT-SP-BACKBONE, US
 20940        4026         3884  AKAMAI-ASN1, NL
 11492        4540         3867  CABLEONE, 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
     33492  UNALLOCATED  8.6.184.0/23             33650  COMCAST-33650, US
     33123  UNALLOCATED  8.10.69.0/24             11168  SCC, US
     12169  UNALLOCATED  8.15.207.0/24            32787  PROLEXIC-TECHNOLOGIES-DDOS-M
     40493  UNALLOCATED  8.17.26.0/24              3356  LEVEL3, US
     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

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
23.140.216.0/24      Origin:     27176  DATAWAGON, US
23.140.216.0/24     Transit:     20278  NEXEON, US
23.141.0.0/24        Origin:    395350  RESERVED, ZZ
23.141.0.0/24       Transit:     11426  TWC-11426-CAROLINAS, US
23.164.232.0/24      Origin:     53763  LAKESIDE, US
23.164.232.0/24     Transit:     20473  AS-CHOOPA, US
23.176.160.0/24      Origin:    397327  RESERVED, ZZ
23.176.160.0/24     Transit:     19108  SUDDENLINK-COMMUNICATIONS, US
23.189.192.0/24      Origin:     27593  RESERVED, ZZ
23.189.192.0/24     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       /9:14      /10:38      /11:100     /12:299     
/13:582     /14:1195    /15:2060    /16:13470   /17:8335    /18:13832   
/19:25159   /20:44409   /21:51564   /22:110495  /23:99382   /24:562275  
/25:733     /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        6495        7405  UNI2-AS, ES
  8151        5970       11934  UNINET, MX
 11492        3453        4540  CABLEONE, US
  6327        3356        3547  SHAW, CA
 39891        3324        4570  ALJAWWALSTC-AS, SA
  7155        3119        4174  VIASAT-SP-BACKBONE, US
  8551        2920        3443  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
 22773        2569        3515  ASN-CXA-ALL-CCI-22773-RDC, US
 30036        2148        2493  MEDIACOM-ENTERPRISE-BUSINESS, US
 10620        2118        3544  Telmex Colombia S.A., CO

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

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

   1:2250      2:1432      3:271       4:5         5:4390      6:159    
   7:6         8:1540      9:1        11:172      12:1497     13:350    
  14:2319     15:304      16:202      17:369      18:666      20:316    
  21:4        22:188      23:6499     24:2549     25:2        27:2534   
  29:19       31:2555     32:71       34:28       35:118      36:2018   
  37:4480     38:5504     39:865      40:149      41:3977     42:2073   
  43:2300     44:326      45:16769    46:4385     47:372      49:1875   
  50:1886     51:577      52:1587     54:390      55:885      56:5      
  57:127      58:1887     59:1173     60:1011     61:2553     62:2669   
  63:1903     64:5519     65:2342     66:5017     67:3057     68:1343   
  69:4136     70:1185     71:624      72:2943     74:2637     75:1565   
  76:640      77:2333     78:1826     79:3002     80:2103     81:1867   
  82:1525     83:1304     84:1617     85:3017     86:770      87:1936   
  88:1230     89:3954     90:624      91:7861     92:2127     93:2634   
  94:3564     95:3998     96:1302     97:315      98:1085     99:734    
 100:91      101:1142    102:2924    103:32179   104:4780    105:576    
 106:989     107:2781    108:1138    109:4260    110:2138    111:3184   
 112:2065    113:1805    114:1706    115:1986    116:1934    117:2480   
 118:2691    119:1943    120:1786    121:1245    122:2625    123:2224   
 124:1623    125:2640    128:1463    129:920     130:1053    131:1981   
 132:817     133:408     134:1693    135:300     136:909     137:983    
 138:2694    139:1584    140:1328    141:1327    142:1545    143:1531   
 144:1005    145:344     146:1963    147:1627    148:2451    149:2374   
 150:878     151:1243    152:1843    153:534     154:5292    155:1394   
 156:2102    157:1355    158:1059    159:2197    160:2615    161:1595   
 162:3512    163:1611    164:1682    165:1849    166:1075    167:1755   
 168:3874    169:792     170:4640    171:952     172:3868    173:3001   
 174:981     175:1189    176:3617    177:4506    178:3540    179:2192   
 180:2282    181:3584    182:3405    183:1989    184:2259    185:20652  
 186:4751    187:4216    188:4058    189:3946    190:9317    191:1422   
 192:10990   193:8968    194:7315    195:5232    196:3124    197:2511   
 198:6033    199:6449    200:8065    201:6197    202:10593   203:10049  
 204:4555    205:3710    206:4398    207:3522    208:4128    209:4924   
 210:4502    211:2542    212:4260    213:3404    214:1118    215:71     
 216:6726    217:2762    218:1309    219:583     220:2034    221:998    
 222:858     223:2188   

End of report


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