[SANOG] Weekly Global IPv4 Routing Table Report

Routing Table Analysis Role Account cscora at apnic.net
Fri Apr 22 18:02:51 UTC 2022


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

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

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

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

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

IPv4 Routing Table Report   04:00 +10GMT Sat 23 Apr, 2022

  BGP Table (Global) as seen in Japan.

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

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

BGP routing table entries examined:                              897069
    Prefixes after maximum aggregation (per Origin AS):          337713
    Deaggregation factor:                                          2.66
    Unique aggregates announced (without unneeded subnets):      430679
Total ASes present in the Internet Routing Table:                 73062
    Prefixes per ASN:                                             12.28
Origin-only ASes present in the Internet Routing Table:           62711
Origin ASes announcing only one prefix:                           25747
Transit ASes present in the Internet Routing Table:               10351
Transit-only ASes present in the Internet Routing Table:            368
Average AS path length visible in the Internet Routing Table:       4.4
    Max AS path length visible:                                      65
    Max AS path prepend of ASN (267602)                              58
Prefixes from unregistered ASNs in the Routing Table:               873
    Number of instances of unregistered ASNs:                       878
Number of 32-bit ASNs allocated by the RIRs:                      39171
Number of 32-bit ASNs visible in the Routing Table:               32539
Prefixes from 32-bit ASNs in the Routing Table:                  153339
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:            500
Number of addresses announced to Internet:                   3067462272
    Equivalent to 182 /8s, 213 /16s and 194 /24s
    Percentage of available address space announced:               82.9
    Percentage of allocated address space announced:               82.9
    Percentage of available address space allocated:              100.0
    Percentage of address space in use by end-sites:               99.6
Total number of prefixes smaller than registry allocations:      304272

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

Prefixes being announced by APNIC Region ASes:                   235509
    Total APNIC prefixes after maximum aggregation:               66616
    APNIC Deaggregation factor:                                    3.54
Prefixes being announced from the APNIC address blocks:          230404
    Unique aggregates announced from the APNIC address blocks:    94659
APNIC Region origin ASes present in the Internet Routing Table:   12580
    APNIC Prefixes per ASN:                                       18.32
APNIC Region origin ASes announcing only one prefix:               3578
APNIC Region transit ASes present in the Internet Routing Table:   1726
Average APNIC Region AS path length visible:                        4.8
    Max APNIC Region AS path length visible:                         27
Number of APNIC region 32-bit ASNs visible in the Routing Table:   7780
Number of APNIC addresses announced to Internet:              774164736
    Equivalent to 46 /8s, 36 /16s and 209 /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:                    261091
    Total ARIN prefixes after maximum aggregation:               119889
    ARIN Deaggregation factor:                                     2.18
Prefixes being announced from the ARIN address blocks:           261092
    Unique aggregates announced from the ARIN address blocks:    124736
ARIN Region origin ASes present in the Internet Routing Table:    19012
    ARIN Prefixes per ASN:                                        13.73
ARIN Region origin ASes announcing only one prefix:                6900
ARIN Region transit ASes present in the Internet Routing Table:    1949
Average ARIN Region AS path length visible:                         3.8
    Max ARIN Region AS path length visible:                          37
Number of ARIN region 32-bit ASNs visible in the Routing Table:    4459
Number of ARIN addresses announced to Internet:              1295350784
    Equivalent to 77 /8s, 53 /16s and 124 /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:                    257187
    Total RIPE prefixes after maximum aggregation:               117442
    RIPE Deaggregation factor:                                     2.19
Prefixes being announced from the RIPE address blocks:           254558
    Unique aggregates announced from the RIPE address blocks:    150612
RIPE Region origin ASes present in the Internet Routing Table:    28140
    RIPE Prefixes per ASN:                                         9.05
RIPE Region origin ASes announcing only one prefix:               12053
RIPE Region transit ASes present in the Internet Routing Table:    3979
Average RIPE Region AS path length visible:                         4.3
    Max RIPE Region AS path length visible:                          28
Number of RIPE region 32-bit ASNs visible in the Routing Table:   10699
Number of RIPE addresses announced to Internet:               713805952
    Equivalent to 42 /8s, 139 /16s and 208 /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:                  114636
    Total LACNIC prefixes after maximum aggregation:              27630
    LACNIC Deaggregation factor:                                   4.15
Prefixes being announced from the LACNIC address blocks:         114525
    Unique aggregates announced from the LACNIC address blocks:   48486
LACNIC Region origin ASes present in the Internet Routing Table:  10953
    LACNIC Prefixes per ASN:                                      10.46
LACNIC Region origin ASes announcing only one prefix:              2651
LACNIC Region transit ASes present in the Internet Routing Table:  2196
Average LACNIC Region AS path length visible:                       4.9
    Max LACNIC Region AS path length visible:                        65
Number of LACNIC region 32-bit ASNs visible in the Routing Table:  8644
Number of LACNIC addresses announced to Internet:             176417024
    Equivalent to 10 /8s, 131 /16s and 233 /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:                  27773
    Total AfriNIC prefixes after maximum aggregation:              5457
    AfriNIC Deaggregation factor:                                  5.09
Prefixes being announced from the AfriNIC address blocks:         35990
    Unique aggregates announced from the AfriNIC address blocks:  11753
AfriNIC Region origin ASes present in the Internet Routing Table:  1627
    AfriNIC Prefixes per ASN:                                     22.12
AfriNIC Region origin ASes announcing only one prefix:              565
AfriNIC Region transit ASes present in the Internet Routing Table:  326
Average AfriNIC Region AS path length visible:                      5.2
    Max AfriNIC Region AS path length visible:                       34
Number of AfriNIC region 32-bit ASNs visible in the Routing Table:  957
Number of AfriNIC addresses announced to Internet:            107442944
    Equivalent to 6 /8s, 103 /16s and 115 /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        9147       8884      44  CHINAMOBILE-CN China Mobile Communicati
  7545        5912        789     697  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4712       4192      75  ERX-CERNET-BKB China Education and Rese
  7552        3592       1330      19  VIETEL-AS-AP Viettel Group, VN
  7713        3502       1039      53  TELKOMNET-AS-AP PT Telekomunikasi Indon
 45899        3427       1880      56  VNPT-AS-VN VNPT Corp, VN
  4766        2497      11121     601  KIXS-AS-KR Korea Telecom, KR
  9498        2397        491     238  BBIL-AP BHARTI Airtel Ltd., IN
 45090        2169       1438      79  TENCENT-NET-AP Shenzhen Tencent Compute
  4755        2118        429     197  TATACOMM-AS TATA Communications formerl

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

ARIN Region per AS prefix count summary
---------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
 16509        6200      10263    2693  AMAZON-02, US
 11492        4474        297     690  CABLEONE, US
 22773        3942       3077     365  ASN-CXA-ALL-CCI-22773-RDC, US
  7155        3900        264      31  VIASAT-SP-BACKBONE, US
 16625        3615       1852    2552  AKAMAI-AS, US
  6327        3431       1318      62  SHAW, CA
   749        2882      50780    2138  DNIC-AS-00749, US
 30036        2617        374     132  MEDIACOM-ENTERPRISE-BUSINESS, US
   209        2521       4962     423  CENTURYLINK-US-LEGACY-QWEST, US
 20115        2255       3051     492  CHARTER-20115, US

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

RIPE Region per AS prefix count summary
---------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
 12479        6787       1730     150  UNI2-AS, ES
  9121        6731       1692      17  TTNET, TR
  8551        4010        374      39  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
 20940        3924       3360     201  AKAMAI-ASN1, NL
 39891        3819        220      34  ALJAWWALSTC-AS, SA
 12389        2952       2273     908  ROSTELECOM-AS, RU
  6849        2907        355      21  UKRTELNET, UA
  9009        2473        247    1284  M247, GB
 34984        2238        357     632  TELLCOM-AS, TR
 47331        2088        328    1598  TTNET, TR

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       10587       3392     559  Uninet S.A. de C.V., MX
 10620        3469        518     748  Telmex Colombia S.A., CO
 11830        2430        369      63  Instituto Costarricense de Electricidad
 13999        1757        296     471  Mega Cable, S.A. de C.V., MX
  6503        1452        354     523  Axtel, S.A.B. de C.V., MX
 28573        1397       2333     253  CLARO S.A., BR
  3816        1255        667     147  COLOMBIA TELECOMUNICACIONES S.A. ESP, C
  6147        1083        369      21  Telefonica del Peru S.A.A., PE
 11664        1023        191     447  Techtel LMDS Comunicaciones Interactiva
 11172         961        133      63  Alestra, S. de R.L. de C.V., MX

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        1656        393      21  LINKdotNET-AS, EG
 24835        1473        523      33  RAYA-AS, EG
 36992        1314       1519     263  ETISALAT-MISR, EG
 36903        1199        545     114  MT-MPLS, MA
 29571         907         65      59  ORANGE-COTE-IVOIRE, CI
 36935         773        520      42  Vodafone-, EG
  6713         612       1863      34  IAM-AS, MA
 15399         514         51      32  WANANCHI-, KE
 37342         468         32       1  MOVITEL, MZ
 23889         424        232      16  MauritiusTelecom, MU

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

Global Per AS prefix count summary
----------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
  8151       10587       3392     559  Uninet S.A. de C.V., MX
  9808        9147       8884      44  CHINAMOBILE-CN China Mobile Communicati
 12479        6787       1730     150  UNI2-AS, ES
  9121        6731       1692      17  TTNET, TR
 16509        6200      10263    2693  AMAZON-02, US
  7545        5912        789     697  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4712       4192      75  ERX-CERNET-BKB China Education and Rese
 11492        4474        297     690  CABLEONE, US
  8551        4010        374      39  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
 22773        3942       3077     365  ASN-CXA-ALL-CCI-22773-RDC, US

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

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

   ASN  No of nets  Net Savings  Description
  9808        9147         9103  CHINAMOBILE-CN China Mobile Communications Grou
  9121        6731         6714  TTNET, TR
 12479        6787         6637  UNI2-AS, ES
  7545        5912         5215  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4712         4637  ERX-CERNET-BKB China Education and Research Net
  8551        4010         3971  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
  7155        3900         3869  VIASAT-SP-BACKBONE, US
 39891        3819         3785  ALJAWWALSTC-AS, SA
 11492        4474         3784  CABLEONE, US
 20940        3924         3723  AKAMAI-ASN1, NL

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
     62828  UNALLOCATED  8.21.130.0/24             3356  LEVEL3, US
    393266  UNALLOCATED  8.23.52.0/24             46887  LIGHTOWER, US
     18604  UNALLOCATED  8.25.204.0/24             3356  LEVEL3, US
    394936  UNALLOCATED  8.33.224.0/24            22442  HOU-PHONOSCOPE, US
     54338  UNALLOCATED  8.33.241.0/24             6461  ZAYO-6461, US
    395438  UNALLOCATED  8.42.206.0/24             3356  LEVEL3, US
    395056  UNALLOCATED  8.45.133.0/24             3356  LEVEL3, US
     32306  UNALLOCATED  8.46.80.0/24             33652  CMCS, US

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
23.135.82.0/24       Origin:    206203  ASHNET-AS, US
23.135.82.0/24      Transit:     20473  AS-CHOOPA, 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       /9:13      /10:41      /11:100     /12:303     
/13:592     /14:1203    /15:2060    /16:13529   /17:8262    /18:13908   
/19:25201   /20:43733   /21:52325   /22:108575  /23:95988   /24:530390  
/25:830     /26:0       /27:0       /28:0       /29:0       /30:0       
/31:0       /32:0       

Advertised prefixes smaller than registry allocations
-----------------------------------------------------

   ASN  No of nets  Total ann.  Description
  9121        5886        6731  TTNET, TR
 12479        5769        6787  UNI2-AS, ES
  8151        4243       10587  Uninet S.A. de C.V., MX
  8551        3476        4010  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
 11492        3380        4474  CABLEONE, US
  6327        3243        3431  SHAW, CA
 39891        3131        3819  ALJAWWALSTC-AS, SA
  7155        2990        3900  VIASAT-SP-BACKBONE, US
 22773        2942        3942  ASN-CXA-ALL-CCI-22773-RDC, US
  6849        2758        2907  UKRTELNET, UA

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

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

   1:1942      2:1034      3:155       4:7         5:3790      6:103    
   7:5         8:1565      9:1        11:172      12:1710     13:298    
  14:2380     15:192      16:45       17:381      18:156      20:194    
  21:4        22:188      23:5625     24:2301     25:6        27:2595   
  29:19       31:2417     32:96       34:1        35:73       36:1755   
  37:4418     38:2809     39:700      40:153      41:3945     42:1076   
  43:2194     44:288      45:16013    46:4124     47:336      49:1693   
  50:1933     51:101      52:1412     54:363      55:716      56:8      
  57:58       58:1806     59:1204     60:957      61:2268     62:2489   
  63:1955     64:5511     65:2297     66:4853     67:2973     68:1192   
  69:4146     70:1338     71:658      72:3050     74:2664     75:1387   
  76:589      77:2179     78:3905     79:3112     80:1975     81:1738   
  82:1499     83:1209     84:1367     85:3650     86:708      87:1960   
  88:2734     89:3274     90:521      91:7627     92:1998     93:2594   
  94:3508     95:4785     96:1298     97:351      98:991      99:736    
 100:75      101:1041    102:2052    103:28936   104:4361    105:466    
 106:858     107:2515    108:836     109:4214    110:2074    111:3288   
 112:2033    113:1537    114:1489    115:1962    116:1901    117:2518   
 118:2331    119:1853    120:1690    121:1073    122:2577    123:2125   
 124:1591    125:2116    128:1228    129:1099    130:966     131:2048   
 132:766     133:373     134:1926    135:291     136:883     137:859    
 138:2438    139:1503    140:864     141:1403    142:1292    143:1468   
 144:1213    145:344     146:1814    147:1496    148:2214    149:1731   
 150:854     151:1083    152:1855    153:458     154:3570    155:1428   
 156:1859    157:1227    158:1038    159:2110    160:2471    161:1325   
 162:3459    163:1253    164:1636    165:1613    166:700     167:1712   
 168:3805    169:833     170:4452    171:831     172:3140    173:3089   
 174:1022    175:1127    176:3523    177:4636    178:3506    179:2011   
 180:2277    181:2973    182:3240    183:1954    184:2390    185:19460  
 186:4360    187:3703    188:3866    189:3205    190:8897    191:1318   
 192:10993   193:8618    194:6978    195:4965    196:2974    197:2391   
 198:6030    199:6036    200:7489    201:5675    202:10489   203:10035  
 204:4559    205:3406    206:3769    207:3393    208:4067    209:4657   
 210:4267    211:2453    212:4033    213:3424    214:1153    215:67     
 216:6439    217:2656    218:1274    219:572     220:1950    221:980    
 222:843     223:2149   

End of report


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