[SANOG] Weekly Global IPv4 Routing Table Report

Routing Table Analysis Role Account cscora at apnic.net
Fri May 19 18:03:34 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 20 May, 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:                              924080
    Prefixes after maximum aggregation (per Origin AS):          349822
    Deaggregation factor:                                          2.64
    Unique aggregates announced (without unneeded subnets):      449331
Total ASes present in the Internet Routing Table:                 74455
    Prefixes per ASN:                                             12.41
Origin-only ASes present in the Internet Routing Table:           63908
Origin ASes announcing only one prefix:                           26264
Transit ASes present in the Internet Routing Table:               10547
Transit-only ASes present in the Internet Routing Table:            432
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:              1074
    Number of instances of unregistered ASNs:                      1075
Number of 32-bit ASNs allocated by the RIRs:                      41898
Number of 32-bit ASNs visible in the Routing Table:               34608
Prefixes from 32-bit ASNs in the Routing Table:                  171767
Number of bogon 32-bit ASNs visible in the Routing Table:            15
Special use prefixes present in the Routing Table:                    1
Prefixes being announced from unallocated address space:            622
Number of addresses announced to Internet:                   3057966848
    Equivalent to 182 /8s, 68 /16s and 223 /24s
    Percentage of available address space announced:               82.6
    Percentage of allocated address space announced:               82.6
    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:      308506

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

Prefixes being announced by APNIC Region ASes:                   245522
    Total APNIC prefixes after maximum aggregation:               69449
    APNIC Deaggregation factor:                                    3.54
Prefixes being announced from the APNIC address blocks:          239730
    Unique aggregates announced from the APNIC address blocks:    98339
APNIC Region origin ASes present in the Internet Routing Table:   13441
    APNIC Prefixes per ASN:                                       17.84
APNIC Region origin ASes announcing only one prefix:               3959
APNIC Region transit ASes present in the Internet Routing Table:   1799
Average APNIC Region AS path length visible:                        4.5
    Max APNIC Region AS path length visible:                         26
Number of APNIC region 32-bit ASNs visible in the Routing Table:   8741
Number of APNIC addresses announced to Internet:              773621376
    Equivalent to 46 /8s, 28 /16s and 134 /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:                    269926
    Total ARIN prefixes after maximum aggregation:               122680
    ARIN Deaggregation factor:                                     2.20
Prefixes being announced from the ARIN address blocks:           272754
    Unique aggregates announced from the ARIN address blocks:    130386
ARIN Region origin ASes present in the Internet Routing Table:    19115
    ARIN Prefixes per ASN:                                        14.27
ARIN Region origin ASes announcing only one prefix:                6984
ARIN Region transit ASes present in the Internet Routing Table:    1960
Average ARIN Region AS path length visible:                         3.7
    Max ARIN Region AS path length visible:                          29
Number of ARIN region 32-bit ASNs visible in the Routing Table:    4800
Number of ARIN addresses announced to Internet:              1281265664
    Equivalent to 76 /8s, 94 /16s and 144 /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:                    260002
    Total RIPE prefixes after maximum aggregation:               122558
    RIPE Deaggregation factor:                                     2.12
Prefixes being announced from the RIPE address blocks:           255899
    Unique aggregates announced from the RIPE address blocks:    158414
RIPE Region origin ASes present in the Internet Routing Table:    28333
    RIPE Prefixes per ASN:                                         9.03
RIPE Region origin ASes announcing only one prefix:               12060
RIPE Region transit ASes present in the Internet Routing Table:    3960
Average RIPE Region AS path length visible:                         4.2
    Max RIPE Region AS path length visible:                          31
Number of RIPE region 32-bit ASNs visible in the Routing Table:   11194
Number of RIPE addresses announced to Internet:               717968512
    Equivalent to 42 /8s, 203 /16s and 84 /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:                  118348
    Total LACNIC prefixes after maximum aggregation:              28519
    LACNIC Deaggregation factor:                                   4.15
Prefixes being announced from the LACNIC address blocks:         117547
    Unique aggregates announced from the LACNIC address blocks:   49414
LACNIC Region origin ASes present in the Internet Routing Table:  11000
    LACNIC Prefixes per ASN:                                      10.69
LACNIC Region origin ASes announcing only one prefix:              2649
LACNIC Region transit ASes present in the Internet Routing Table:  2285
Average LACNIC Region AS path length visible:                       5.0
    Max LACNIC Region AS path length visible:                        55
Number of LACNIC region 32-bit ASNs visible in the Routing Table:  8785
Number of LACNIC addresses announced to Internet:             176955136
    Equivalent to 10 /8s, 140 /16s and 31 /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:                  29208
    Total AfriNIC prefixes after maximum aggregation:              5837
    AfriNIC Deaggregation factor:                                  5.00
Prefixes being announced from the AfriNIC address blocks:         37528
    Unique aggregates announced from the AfriNIC address blocks:  12260
AfriNIC Region origin ASes present in the Internet Routing Table:  1743
    AfriNIC Prefixes per ASN:                                     21.53
AfriNIC Region origin ASes announcing only one prefix:              612
AfriNIC Region transit ASes present in the Internet Routing Table:  333
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: 1088
Number of AfriNIC addresses announced to Internet:            107748096
    Equivalent to 6 /8s, 108 /16s and 27 /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        9500       8706      40  CHINAMOBILE-CN China Mobile Communicati
  7545        5718        784     689  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4864       4192      75  ERX-CERNET-BKB China Education and Rese
 18403        4131        347      25  FPT-AS-AP FPT Telecom Company, VN
  7713        3561       1043      66  TELKOMNET-AS-AP PT Telekomunikasi Indon
 45899        3394       1872      93  VNPT-AS-VN VNPT Corp, VN
  7552        3229       1331      21  VIETEL-AS-AP Viettel Group, VN
  9498        2961        491     241  BBIL-AP BHARTI Airtel Ltd., IN
  4766        2547      11251     591  KIXS-AS-KR Korea Telecom, KR
 24560        2399        837     443  AIRTELBROADBAND-AS-AP Bharti Airtel Ltd

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        8277      10775    2955  AMAZON-02, US
 11492        4537        300     609  CABLEONE, US
  7155        4020        281      51  VIASAT-SP-BACKBONE, US
 22773        3566       3051     270  ASN-CXA-ALL-CCI-22773-RDC, US
  6327        3526       1320      64  SHAW, CA
   749        3099      54980    2351  DNIC-AS-00749, US
 16625        3099       1559    2343  AKAMAI-AS, US
396982        2656       3592     373  GOOGLE-CLOUD-PLATFORM, US
 30036        2500        361     448  MEDIACOM-ENTERPRISE-BUSINESS, US
  7018        2495      24148    1570  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        7312       1707     141  UNI2-AS, ES
 39891        4765        282      59  ALJAWWALSTC-AS, SA
 20940        4105       3399     163  AKAMAI-ASN1, NL
  8551        3880        370      37  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
 12389        2948       2292     910  ROSTELECOM-AS, RU
  9009        2700        249    1398  M247, RO
 34984        2280        360     609  TELLCOM-AS, TR
  6849        2017        307      17  UKRTELNET, UA
 58224        1840        948     547  TCI, IR
 61317        1610        108    1213  ASDETUK www.heficed.com, US

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       11304       3348     593  Uninet S.A. de C.V., MX
 10620        3517        508     854  Telmex Colombia S.A., CO
 13999        2346        361     620  Mega Cable, S.A. de C.V., MX
 11830        2270        369      64  Instituto Costarricense de Electricidad
 28573        1330       2323     240  Claro NXT Telecomunicacoes Ltda, BR
  6503        1300        339     514  Axtel, S.A.B. de C.V., MX
  3816        1295        766     172  COLOMBIA TELECOMUNICACIONES S.A. ESP, C
  6147        1134        370      22  Telefonica del Peru S.A.A., PE
 11664        1095        180     441  Techtel LMDS Comunicaciones Interactiva
 26615        1035       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        1605        393      19  LINKdotNET-AS, EG
 24835        1496        533      29  RAYA-AS, EG
 36992        1338       1518     275  ETISALAT-MISR, EG
 36903        1242        550      99  MT-MPLS, MA
 29571        1028         67      47  ORANGE-COTE-IVOIRE, CI
 36935         917        520      42  Vodafone-, EG
  6713         550       1861      34  IAM-AS, MA
 15399         532         54      48  WANANCHI-, KE
 24757         491         73       5  EthioNet-AS, ET
 37342         489         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       11304       3348     593  Uninet S.A. de C.V., MX
  9808        9500       8706      40  CHINAMOBILE-CN China Mobile Communicati
 16509        8277      10775    2955  AMAZON-02, US
 12479        7312       1707     141  UNI2-AS, ES
  7545        5718        784     689  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4864       4192      75  ERX-CERNET-BKB China Education and Rese
 39891        4765        282      59  ALJAWWALSTC-AS, SA
 11492        4537        300     609  CABLEONE, US
 18403        4131        347      25  FPT-AS-AP FPT Telecom Company, VN
 20940        4105       3399     163  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        9500         9460  CHINAMOBILE-CN China Mobile Communications Grou
 12479        7312         7171  UNI2-AS, ES
 16509        8277         5322  AMAZON-02, US
  7545        5718         5029  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4864         4789  ERX-CERNET-BKB China Education and Research Net
 39891        4765         4706  ALJAWWALSTC-AS, SA
 18403        4131         4106  FPT-AS-AP FPT Telecom Company, VN
  7155        4020         3969  VIASAT-SP-BACKBONE, US
 20940        4105         3942  AKAMAI-ASN1, NL
 11492        4537         3928  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
      3507  UNALLOCATED  2.57.241.0/24           213035  AS-SERVERION Serverion B.V.,
      3507  UNALLOCATED  5.105.49.0/24           213035  AS-SERVERION Serverion B.V.,
      3507  UNALLOCATED  5.105.69.0/24           213035  AS-SERVERION Serverion B.V.,
      3507  UNALLOCATED  5.105.206.0/24          213035  AS-SERVERION Serverion B.V.,
     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
     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

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
23.139.232.0/24      Origin:    211619  MAXKO, HR
23.139.232.0/24     Transit:     42864  GIGANET-HU GigaNet Internet Service Prov
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  UNASSIGNED
23.141.0.0/24       Transit:     11426  TWC-11426-CAROLINAS, US
27.100.7.0/24        Origin:     56096  UNASSIGNED
27.100.7.0/24       Transit:     45455  TH-2S1N-AP Two S One N Co Ltd, Internet 
41.57.124.0/22       Origin:     37442  UNASSIGNED
41.57.124.0/22      Transit:     37204  TELONE, ZW

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      /10:39      /11:104     /12:301     
/13:581     /14:1200    /15:2053    /16:13479   /17:8235    /18:13852   
/19:25136   /20:44172   /21:51371   /22:109824  /23:98240   /24:554716  
/25:747     /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        6382        7312  UNI2-AS, ES
  8151        5268       11304  Uninet S.A. de C.V., MX
 39891        3628        4765  ALJAWWALSTC-AS, SA
 11492        3444        4537  CABLEONE, US
  8551        3352        3880  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
  6327        3335        3526  SHAW, CA
  7155        3070        4020  VIASAT-SP-BACKBONE, US
 22773        2635        3566  ASN-CXA-ALL-CCI-22773-RDC, US
 30036        2156        2500  MEDIACOM-ENTERPRISE-BUSINESS, US
 10620        2070        3517  Telmex Colombia S.A., CO

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

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

   1:2169      2:1310      3:175       4:5         5:4537      6:130    
   7:6         8:1553      9:1        11:172      12:1537     13:388    
  14:2314     15:303      16:188      17:373      18:417      20:258    
  21:4        22:188      23:6279     24:2606     25:6        27:2463   
  29:19       31:2492     32:79       34:21       35:112      36:1962   
  37:4686     38:4636     39:845      40:152      41:3920     42:1962   
  43:2363     44:310      45:16522    46:4325     47:363      49:1766   
  50:1859     51:571      52:1600     54:392      55:855      56:8      
  57:113      58:1890     59:1153     60:987      61:2504     62:2683   
  63:1927     64:5673     65:2323     66:5033     67:2996     68:1345   
  69:4109     70:1223     71:670      72:2992     74:2616     75:1557   
  76:609      77:2449     78:1818     79:3169     80:2122     81:1784   
  82:1501     83:1276     84:1531     85:2988     86:769      87:2012   
  88:1171     89:3712     90:618      91:7745     92:2062     93:2619   
  94:3625     95:4034     96:1308     97:336      98:1152     99:746    
 100:73      101:1074    102:2689    103:31360   104:4690    105:493    
 106:952     107:2583    108:1042    109:4415    110:2116    111:3158   
 112:2037    113:1778    114:1652    115:1979    116:1917    117:2532   
 118:2616    119:2015    120:1826    121:1130    122:2600    123:2179   
 124:1610    125:2500    128:1403    129:1026    130:1024    131:1984   
 132:811     133:422     134:1928    135:305     136:877     137:951    
 138:2560    139:1565    140:1248    141:1436    142:1458    143:1509   
 144:1153    145:346     146:1933    147:1586    148:2383    149:2245   
 150:875     151:1157    152:1826    153:487     154:4404    155:1442   
 156:1787    157:1317    158:1077    159:2235    160:2540    161:1541   
 162:3516    163:1526    164:1613    165:1740    166:1076    167:1730   
 168:3882    169:939     170:4585    171:877     172:3562    173:2958   
 174:1077    175:1180    176:3716    177:4622    178:3598    179:2212   
 180:2589    181:3493    182:3392    183:2102    184:2352    185:20272  
 186:4744    187:4012    188:4120    189:3634    190:9172    191:1444   
 192:10937   193:8872    194:7308    195:5195    196:3094    197:2378   
 198:5959    199:6085    200:8055    201:5905    202:10686   203:10304  
 204:4578    205:3702    206:4292    207:3460    208:4103    209:4901   
 210:4447    211:2511    212:4174    213:3620    214:1090    215:59     
 216:6651    217:2697    218:1298    219:578     220:1991    221:976    
 222:883     223:2183   

End of report


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