[SANOG] Weekly Global IPv4 Routing Table Report

Routing Table Analysis Role Account cscora at apnic.net
Fri Mar 31 18:03:22 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 01 Apr, 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:                              917070
    Prefixes after maximum aggregation (per Origin AS):          348172
    Deaggregation factor:                                          2.63
    Unique aggregates announced (without unneeded subnets):      447686
Total ASes present in the Internet Routing Table:                 74255
    Prefixes per ASN:                                             12.35
Origin-only ASes present in the Internet Routing Table:           63714
Origin ASes announcing only one prefix:                           26176
Transit ASes present in the Internet Routing Table:               10541
Transit-only ASes present in the Internet Routing Table:            443
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:              1115
    Number of instances of unregistered ASNs:                      1115
Number of 32-bit ASNs allocated by the RIRs:                      41565
Number of 32-bit ASNs visible in the Routing Table:               34398
Prefixes from 32-bit ASNs in the Routing Table:                  169231
Number of bogon 32-bit ASNs visible in the Routing Table:            60
Special use prefixes present in the Routing Table:                    1
Prefixes being announced from unallocated address space:            497
Number of addresses announced to Internet:                   3062486272
    Equivalent to 182 /8s, 137 /16s and 213 /24s
    Percentage of available address space announced:               82.7
    Percentage of allocated address space announced:               82.7
    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:      306990

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

Prefixes being announced by APNIC Region ASes:                   242093
    Total APNIC prefixes after maximum aggregation:               69211
    APNIC Deaggregation factor:                                    3.50
Prefixes being announced from the APNIC address blocks:          236746
    Unique aggregates announced from the APNIC address blocks:    98032
APNIC Region origin ASes present in the Internet Routing Table:   13396
    APNIC Prefixes per ASN:                                       17.67
APNIC Region origin ASes announcing only one prefix:               3933
APNIC Region transit ASes present in the Internet Routing Table:   1804
Average APNIC Region AS path length visible:                        4.5
    Max APNIC Region AS path length visible:                         38
Number of APNIC region 32-bit ASNs visible in the Routing Table:   8680
Number of APNIC addresses announced to Internet:              773780096
    Equivalent to 46 /8s, 30 /16s and 242 /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:                    268442
    Total ARIN prefixes after maximum aggregation:               122101
    ARIN Deaggregation factor:                                     2.20
Prefixes being announced from the ARIN address blocks:           270802
    Unique aggregates announced from the ARIN address blocks:    130492
ARIN Region origin ASes present in the Internet Routing Table:    19067
    ARIN Prefixes per ASN:                                        14.20
ARIN Region origin ASes announcing only one prefix:                6961
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:                          24
Number of ARIN region 32-bit ASNs visible in the Routing Table:    4765
Number of ARIN addresses announced to Internet:              1285972224
    Equivalent to 76 /8s, 166 /16s and 97 /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:                    258614
    Total RIPE prefixes after maximum aggregation:               121854
    RIPE Deaggregation factor:                                     2.12
Prefixes being announced from the RIPE address blocks:           254694
    Unique aggregates announced from the RIPE address blocks:    157454
RIPE Region origin ASes present in the Internet Routing Table:    28265
    RIPE Prefixes per ASN:                                         9.01
RIPE Region origin ASes announcing only one prefix:               12031
RIPE Region transit ASes present in the Internet Routing Table:    3962
Average RIPE Region AS path length visible:                         4.3
    Max RIPE Region AS path length visible:                          31
Number of RIPE region 32-bit ASNs visible in the Routing Table:   11107
Number of RIPE addresses announced to Internet:               717980544
    Equivalent to 42 /8s, 203 /16s and 131 /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:                  117628
    Total LACNIC prefixes after maximum aggregation:              28474
    LACNIC Deaggregation factor:                                   4.13
Prefixes being announced from the LACNIC address blocks:         116991
    Unique aggregates announced from the LACNIC address blocks:   49097
LACNIC Region origin ASes present in the Internet Routing Table:  10970
    LACNIC Prefixes per ASN:                                      10.66
LACNIC Region origin ASes announcing only one prefix:              2644
LACNIC Region transit ASes present in the Internet Routing Table:  2276
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:  8766
Number of LACNIC addresses announced to Internet:             176631040
    Equivalent to 10 /8s, 135 /16s and 45 /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:                  29178
    Total AfriNIC prefixes after maximum aggregation:              5773
    AfriNIC Deaggregation factor:                                  5.05
Prefixes being announced from the AfriNIC address blocks:         37340
    Unique aggregates announced from the AfriNIC address blocks:  12210
AfriNIC Region origin ASes present in the Internet Routing Table:  1733
    AfriNIC Prefixes per ASN:                                     21.55
AfriNIC Region origin ASes announcing only one prefix:              607
AfriNIC Region transit ASes present in the Internet Routing Table:  336
Average AfriNIC Region AS path length visible:                      5.0
    Max AfriNIC Region AS path length visible:                       40
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 1080
Number of AfriNIC addresses announced to Internet:            107755264
    Equivalent to 6 /8s, 108 /16s and 55 /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        9506       8884      51  CHINAMOBILE-CN China Mobile Communicati
  7545        5756        786     689  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4865       4192      75  ERX-CERNET-BKB China Education and Rese
  7713        3532       1043      65  TELKOMNET-AS-AP PT Telekomunikasi Indon
  7552        3437       1331      21  VIETEL-AS-AP Viettel Group, VN
 45899        3381       1872      93  VNPT-AS-VN VNPT Corp, VN
  9498        2903        491     237  BBIL-AP BHARTI Airtel Ltd., IN
  4766        2557      11252     593  KIXS-AS-KR Korea Telecom, KR
 24560        2363        836     440  AIRTELBROADBAND-AS-AP Bharti Airtel Ltd
 45090        2184       1438      79  TENCENT-NET-AP Shenzhen Tencent Compute

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

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

   ASN  No of nets  /20 equiv  MaxAgg  Description
 16509        8192      10775    2874  AMAZON-02, US
 11492        4537        300     622  CABLEONE, US
  7155        3963        279      46  VIASAT-SP-BACKBONE, US
 22773        3621       3062     293  ASN-CXA-ALL-CCI-22773-RDC, US
  6327        3514       1320      64  SHAW, CA
 16625        3163       1590    2343  AKAMAI-AS, US
   749        3036      50520    2303  DNIC-AS-00749, US
396982        2626       3588     360  GOOGLE-CLOUD-PLATFORM, US
  7018        2567      24117    1575  ATT-INTERNET4, US
 30036        2501        360     497  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        7262       1705     149  UNI2-AS, ES
 39891        4833        286      59  ALJAWWALSTC-AS, SA
 20940        4060       3399     164  AKAMAI-ASN1, NL
  8551        3888        370      37  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
 12389        2952       2292     911  ROSTELECOM-AS, RU
  9009        2672        252    1392  M247, RO
 34984        2268        359     609  TELLCOM-AS, TR
  6849        2173        307      18  UKRTELNET, UA
 58224        1850        950     543  TCI, IR
 13188        1607        100      27  TRIOLAN, UA

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

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

   ASN  No of nets  /20 equiv  MaxAgg  Description
  8151       11205       3343     577  Uninet S.A. de C.V., MX
 10620        3499        506     850  Telmex Colombia S.A., CO
 13999        2305        368     607  Mega Cable, S.A. de C.V., MX
 11830        2261        369      64  Instituto Costarricense de Electricidad
 28573        1332       2325     235  Claro NXT Telecomunicacoes Ltda, BR
  3816        1303        767     159  COLOMBIA TELECOMUNICACIONES S.A. ESP, C
  6503        1298        339     514  Axtel, S.A.B. de C.V., MX
  6147        1131        370      22  Telefonica del Peru S.A.A., PE
 11664        1101        180     451  Techtel LMDS Comunicaciones Interactiva
 26615        1030       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
 24835        1527        533      30  RAYA-AS, EG
 24863        1524        393      19  LINKdotNET-AS, EG
 36992        1341       1518     275  ETISALAT-MISR, EG
 36903        1242        550      99  MT-MPLS, MA
 29571        1018         67      48  ORANGE-COTE-IVOIRE, CI
 36935         880        520      42  Vodafone-, EG
  6713         550       1861      34  IAM-AS, MA
 15399         530         54      47  WANANCHI-, KE
 37342         493         32       1  MOVITEL, MZ
 24757         488         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       11205       3343     577  Uninet S.A. de C.V., MX
  9808        9506       8884      51  CHINAMOBILE-CN China Mobile Communicati
 16509        8192      10775    2874  AMAZON-02, US
 12479        7262       1705     149  UNI2-AS, ES
  7545        5756        786     689  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4865       4192      75  ERX-CERNET-BKB China Education and Rese
 39891        4833        286      59  ALJAWWALSTC-AS, SA
 11492        4537        300     622  CABLEONE, US
 20940        4060       3399     164  AKAMAI-ASN1, NL
  7155        3963        279      46  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        9506         9455  CHINAMOBILE-CN China Mobile Communications Grou
 12479        7262         7113  UNI2-AS, ES
 16509        8192         5318  AMAZON-02, US
  7545        5756         5067  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4865         4790  ERX-CERNET-BKB China Education and Research Net
 39891        4833         4774  ALJAWWALSTC-AS, SA
  7155        3963         3917  VIASAT-SP-BACKBONE, US
 11492        4537         3915  CABLEONE, US
 20940        4060         3896  AKAMAI-ASN1, NL
  8551        3888         3851  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo

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

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

    Bad AS  Designation  Net Originated      Transit AS  Transit AS Name
      3507  UNALLOCATED  5.105.166.0/24          213035  AS-SERVERION Serverion B.V.,
     33123  UNALLOCATED  8.10.69.0/24             11168  SCC, US
     12169  UNALLOCATED  8.15.207.0/24            32787  PROLEXIC-TECHNOLOGIES-DDOS-M
     53775  UNALLOCATED  8.20.88.0/24              7029  WINDSTREAM, US
     62828  UNALLOCATED  8.21.130.0/24             3356  LEVEL3, US
    393266  UNALLOCATED  8.23.52.0/24             46887  LIGHTOWER, US
    396894  UNALLOCATED  8.28.201.0/24            46887  LIGHTOWER, US
    394936  UNALLOCATED  8.33.224.0/24            22442  HOU-PHONOSCOPE, US
     54338  UNALLOCATED  8.33.241.0/24             6461  ZAYO-6461, US
     18798  UNALLOCATED  8.40.106.0/24             6461  ZAYO-6461, US

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

Prefixes from the Special Purpose Address Registry (Global)
-----------------------------------------------------------

Prefix                Origin AS  Description
192.88.99.0/24             6939  HURRICANE, US

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

Advertised Unallocated Addresses
--------------------------------

Unassigned Network     ASN Information  AS Name
23.131.185.0/24      Origin:       174  COGENT-174, US
23.131.185.0/24     Transit:      2516  KDDI KDDI CORPORATION, JP
23.131.186.0/24      Origin:       174  COGENT-174, US
23.131.186.0/24     Transit:      2516  KDDI KDDI CORPORATION, JP
23.131.187.0/24      Origin:       174  COGENT-174, US
23.131.187.0/24     Transit:      2516  KDDI KDDI CORPORATION, JP
23.131.188.0/24      Origin:       174  COGENT-174, US
23.131.188.0/24     Transit:      2516  KDDI KDDI CORPORATION, JP
23.136.112.0/24      Origin:     54835  UNASSIGNED
23.136.112.0/24     Transit:     21559  OSNET, PR

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

Number of prefixes announced per prefix length (Global)
-------------------------------------------------------

 /1:0        /2:0        /3:0        /4:0        /5:0        /6:0       
 /7:0        /8:16       /9:13      /10:39      /11:103     /12:299     
/13:578     /14:1198    /15:2038    /16:13473   /17:8271    /18:13864   
/19:25195   /20:44276   /21:51559   /22:109685  /23:97736   /24:547997  
/25:730     /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        6322        7262  UNI2-AS, ES
  8151        5172       11205  Uninet S.A. de C.V., MX
 39891        3632        4833  ALJAWWALSTC-AS, SA
 11492        3445        4537  CABLEONE, US
  8551        3360        3888  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
  6327        3323        3514  SHAW, CA
  7155        3038        3963  VIASAT-SP-BACKBONE, US
 22773        2677        3621  ASN-CXA-ALL-CCI-22773-RDC, US
 30036        2158        2501  MEDIACOM-ENTERPRISE-BUSINESS, US
 10620        2053        3499  Telmex Colombia S.A., CO

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

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

   1:1705      2:1232      3:170       4:5         5:4468      6:122    
   7:6         8:1551      9:1        11:172      12:1575     13:391    
  14:2283     15:296      16:137      17:372      18:413      20:248    
  21:4        22:188      23:6169     24:2576     25:6        27:2489   
  29:19       31:2513     32:97       34:10       35:107      36:1914   
  37:4664     38:4398     39:805      40:151      41:3965     42:988    
  43:2345     44:310      45:16559    46:4248     47:375      49:1751   
  50:1835     51:564      52:1594     54:389      55:763      56:8      
  57:90       58:1752     59:1123     60:978      61:2450     62:2642   
  63:1932     64:5672     65:2317     66:4921     67:3016     68:1373   
  69:4151     70:1253     71:669      72:2972     74:2604     75:1462   
  76:613      77:2430     78:1863     79:3166     80:2092     81:1741   
  82:1502     83:1276     84:1531     85:3007     86:754      87:1987   
  88:1247     89:3630     90:616      91:7684     92:2043     93:2583   
  94:3599     95:3999     96:1328     97:336      98:1158     99:746    
 100:73      101:1067    102:2638    103:31154   104:4621    105:483    
 106:907     107:2551    108:1006    109:4387    110:2082    111:3200   
 112:2058    113:1563    114:1630    115:2023    116:1924    117:2552   
 118:2285    119:1980    120:1778    121:1112    122:2603    123:2183   
 124:1617    125:2530    128:1316    129:1070    130:1005    131:1997   
 132:791     133:423     134:1905    135:301     136:872     137:941    
 138:2556    139:1541    140:1222    141:1448    142:1442    143:1496   
 144:1166    145:350     146:1934    147:1569    148:2337    149:1965   
 150:871     151:1153    152:1844    153:488     154:4295    155:1418   
 156:1708    157:1293    158:1047    159:2269    160:2544    161:1517   
 162:3536    163:1505    164:1604    165:1707    166:916     167:1715   
 168:3903    169:936     170:4622    171:877     172:3536    173:2946   
 174:1018    175:1159    176:3684    177:4622    178:3636    179:2165   
 180:2406    181:3431    182:3368    183:1929    184:2352    185:20135  
 186:4660    187:3944    188:4106    189:3574    190:9163    191:1435   
 192:10933   193:8845    194:7312    195:5170    196:3091    197:2410   
 198:5962    199:6080    200:7887    201:5862    202:10750   203:10207  
 204:4627    205:3549    206:3963    207:3450    208:4092    209:4894   
 210:4439    211:2497    212:4105    213:3541    214:1084    215:60     
 216:6618    217:2681    218:1294    219:581     220:2016    221:975    
 222:889     223:2183   

End of report


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