[SANOG] Weekly Global IPv4 Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri Sep 24 18:03:26 UTC 2021


This is an automated weekly mailing describing the state of the Internet
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 http://thyme.rand.apnic.net.

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

Global IPv4 Routing Table Report   04:00 +10GMT Sat 25 Sep, 2021

Report Website:     http://thyme.rand.apnic.net
Detailed Analysis:  http://thyme.rand.apnic.net/current/

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

BGP routing table entries examined:                              864175
    Prefixes after maximum aggregation (per Origin AS):          327027
    Deaggregation factor:                                          2.64
    Unique aggregates announced (without unneeded subnets):      416114
Total ASes present in the Internet Routing Table:                 72001
    Prefixes per ASN:                                             12.00
Origin-only ASes present in the Internet Routing Table:           61879
Origin ASes announcing only one prefix:                           25534
Transit ASes present in the Internet Routing Table:               10122
Transit-only ASes present in the Internet Routing Table:            341
Average AS path length visible in the Internet Routing Table:       4.3
    Max AS path length visible:                                      42
    Max AS path prepend of ASN ( 45609)                              34
Prefixes from unregistered ASNs in the Routing Table:               907
    Number of instances of unregistered ASNs:                       912
Number of 32-bit ASNs allocated by the RIRs:                      37320
Number of 32-bit ASNs visible in the Routing Table:               31016
Prefixes from 32-bit ASNs in the Routing Table:                  144062
Number of bogon 32-bit ASNs visible in the Routing Table:            32
Special use prefixes present in the Routing Table:                    1
Prefixes being announced from unallocated address space:            463
Number of addresses announced to Internet:                   3065905408
    Equivalent to 182 /8s, 190 /16s and 1 /24s
    Percentage of available address space announced:               82.8
    Percentage of allocated address space announced:               82.8
    Percentage of available address space allocated:              100.0
    Percentage of address space in use by end-sites:               99.5
Total number of prefixes smaller than registry allocations:      287414

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

Prefixes being announced by APNIC Region ASes:                   231616
    Total APNIC prefixes after maximum aggregation:               66252
    APNIC Deaggregation factor:                                    3.50
Prefixes being announced from the APNIC address blocks:          227068
    Unique aggregates announced from the APNIC address blocks:    91891
APNIC Region origin ASes present in the Internet Routing Table:   11991
    APNIC Prefixes per ASN:                                       18.94
APNIC Region origin ASes announcing only one prefix:               3424
APNIC Region transit ASes present in the Internet Routing Table:   1678
Average APNIC Region AS path length visible:                        4.5
    Max APNIC Region AS path length visible:                         37
Number of APNIC region 32-bit ASNs visible in the Routing Table:   7144
Number of APNIC addresses announced to Internet:              772824960
    Equivalent to 46 /8s, 16 /16s and 95 /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, 131072-147769
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:                    252530
    Total ARIN prefixes after maximum aggregation:               115618
    ARIN Deaggregation factor:                                     2.18
Prefixes being announced from the ARIN address blocks:           252353
    Unique aggregates announced from the ARIN address blocks:    120420
ARIN Region origin ASes present in the Internet Routing Table:    18901
    ARIN Prefixes per ASN:                                        13.35
ARIN Region origin ASes announcing only one prefix:                6866
ARIN Region transit ASes present in the Internet Routing Table:    1951
Average ARIN Region AS path length visible:                         3.9
    Max ARIN Region AS path length visible:                          28
Number of ARIN region 32-bit ASNs visible in the Routing Table:    4125
Number of ARIN addresses announced to Internet:              1297036288
    Equivalent to 77 /8s, 79 /16s and 52 /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:                    240870
    Total RIPE prefixes after maximum aggregation:               112656
    RIPE Deaggregation factor:                                     2.14
Prefixes being announced from the RIPE address blocks:           237047
    Unique aggregates announced from the RIPE address blocks:    145189
RIPE Region origin ASes present in the Internet Routing Table:    28037
    RIPE Prefixes per ASN:                                         8.45
RIPE Region origin ASes announcing only one prefix:               12056
RIPE Region transit ASes present in the Internet Routing Table:    3903
Average RIPE Region AS path length visible:                         4.3
    Max RIPE Region AS path length visible:                          29
Number of RIPE region 32-bit ASNs visible in the Routing Table:   10416
Number of RIPE addresses announced to Internet:               711546496
    Equivalent to 42 /8s, 105 /16s and 86 /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:                  111822
    Total LACNIC prefixes after maximum aggregation:              26584
    LACNIC Deaggregation factor:                                   4.21
Prefixes being announced from the LACNIC address blocks:         112781
    Unique aggregates announced from the LACNIC address blocks:   47158
LACNIC Region origin ASes present in the Internet Routing Table:  10796
    LACNIC Prefixes per ASN:                                      10.45
LACNIC Region origin ASes announcing only one prefix:              2651
LACNIC Region transit ASes present in the Internet Routing Table:  2117
Average LACNIC Region AS path length visible:                       4.8
    Max LACNIC Region AS path length visible:                        29
Number of LACNIC region 32-bit ASNs visible in the Routing Table:  8458
Number of LACNIC addresses announced to Internet:             176227072
    Equivalent to 10 /8s, 129 /16s and 3 /24s
LACNIC AS Blocks       26592-26623, 27648-28671, 52224-53247,
                       61440-61951, 64099-64197, 262144-272796 + 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:                  26430
    Total AfriNIC prefixes after maximum aggregation:              5210
    AfriNIC Deaggregation factor:                                  5.07
Prefixes being announced from the AfriNIC address blocks:         34463
    Unique aggregates announced from the AfriNIC address blocks:  11046
AfriNIC Region origin ASes present in the Internet Routing Table:  1542
    AfriNIC Prefixes per ASN:                                     22.35
AfriNIC Region origin ASes announcing only one prefix:              537
AfriNIC Region transit ASes present in the Internet Routing Table:  306
Average AfriNIC Region AS path length visible:                      5.2
    Max AfriNIC Region AS path length visible:                       42
Number of AfriNIC region 32-bit ASNs visible in the Routing Table:  873
Number of AfriNIC addresses announced to Internet:            107936000
    Equivalent to 6 /8s, 110 /16s and 249 /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        8031       9000      57  CMNET-GD Guangdong Mobile Communication
  7545        5824        786     678  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4701       4192      74  ERX-CERNET-BKB China Education and Rese
  7552        3648       1330      20  VIETEL-AS-AP Viettel Group, VN
  7713        3512       1022      56  TELKOMNET-AS-AP PT Telekomunikasi Indon
 45899        2922       1897      56  VNPT-AS-VN VNPT Corp, VN
  4766        2495      11119     576  KIXS-AS-KR Korea Telecom, KR
  9498        2361        485     236  BBIL-AP BHARTI Airtel Ltd., IN
  4755        2147        439     212  TATACOMM-AS TATA Communications formerl
 45090        2127       1198      75  CNNIC-TENCENT-NET-AP Shenzhen Tencent C

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

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

   ASN  No of nets  /20 equiv  MaxAgg  Description
 16509        5580       9747    2477  AMAZON-02, US
 11492        4722        312     747  CABLEONE, US
 22773        4038       3041     316  ASN-CXA-ALL-CCI-22773-RDC, US
  7155        3949        264      32  VIASAT-SP-BACKBONE, US
 16625        3585       1851    2497  AKAMAI-AS, US
  6327        3368       1318      66  SHAW, CA
 30036        2591        374     166  MEDIACOM-ENTERPRISE-BUSINESS, US
   209        2528       5028     450  CENTURYLINK-US-LEGACY-QWEST, US
 20115        2241       3032     504  CHARTER-20115, US
  7018        2233      24177    1423  ATT-INTERNET4, US

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

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

   ASN  No of nets  /20 equiv  MaxAgg  Description
 12479        6885       1726     143  UNI2-AS, ES
 20940        3835       3348     216  AKAMAI-ASN1, NL
  8551        3284        378      39  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
 39891        3269        187      23  ALJAWWALSTC-AS, SA
 12389        2909       2279     895  ROSTELECOM-AS, RU
  9009        2530        263    1337  M247, GB
 34984        2230        358     602  TELLCOM-AS, TR
 61317        1739        260     942  ASDETUK www.heficed.com, GB
 58224        1643        892     572  TCI, IR
 13188        1610        100      27  TRIOLAN, UA

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

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

   ASN  No of nets  /20 equiv  MaxAgg  Description
  8151        8813       3457     574  Uninet S.A. de C.V., MX
 10620        3418        522     686  Telmex Colombia S.A., CO
 11830        2495        369      62  Instituto Costarricense de Electricidad
 13999        1692        365     462  Mega Cable, S.A. de C.V., MX
  6503        1516        359     477  Axtel, S.A.B. de C.V., MX
 28573        1465       2306     239  CLARO S.A., BR
  3816        1235        646     149  COLOMBIA TELECOMUNICACIONES S.A. ESP, C
 26615        1145       2351     136  TIM SA, BR
  6147        1088        369      22  Telefonica del Peru S.A.A., PE
 11172         957        111      70  Alestra, S. de R.L. de C.V., MX

Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-LACNIC

AfriNIC Region per AS prefix count summary
------------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
 24863        1639        393      21  LINKdotNET-AS, EG
 24835        1548        503      32  RAYA-AS, EG
 36992        1288       1417     272  ETISALAT-MISR, EG
 36903        1183        537     110  MT-MPLS, MA
 29571         788         68      11  ORANGE-COTE-IVOIRE, CI
  6713         612       1863      34  IAM-AS, MA
 36935         595        522      40  Vodafone-, EG
 15399         502         49      29  WANANCHI-, KE
 37342         470         32       1  MOVITEL, MZ
  2018         339        319      73  TENET-1, ZA

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

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

   ASN  No of nets  /20 equiv  MaxAgg  Description
  8151        8813       3457     574  Uninet S.A. de C.V., MX
  9808        8031       9000      57  CMNET-GD Guangdong Mobile Communication
 12479        6885       1726     143  UNI2-AS, ES
  7545        5824        786     678  TPG-INTERNET-AP TPG Telecom Limited, AU
 16509        5580       9747    2477  AMAZON-02, US
 11492        4722        312     747  CABLEONE, US
  4538        4701       4192      74  ERX-CERNET-BKB China Education and Rese
 22773        4038       3041     316  ASN-CXA-ALL-CCI-22773-RDC, US
  7155        3949        264      32  VIASAT-SP-BACKBONE, US
 20940        3835       3348     216  AKAMAI-ASN1, NL

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

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

   ASN  No of nets  Net Savings  Description
  9808        8031         7974  CMNET-GD Guangdong Mobile Communication Co.Ltd.
 12479        6885         6742  UNI2-AS, ES
  7545        5824         5146  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4701         4627  ERX-CERNET-BKB China Education and Research Net
 11492        4722         3975  CABLEONE, US
  7155        3949         3917  VIASAT-SP-BACKBONE, US
 22773        4038         3722  ASN-CXA-ALL-CCI-22773-RDC, US
  7552        3648         3628  VIETEL-AS-AP Viettel Group, VN
 20940        3835         3619  AKAMAI-ASN1, NL
  7713        3512         3456  TELKOMNET-AS-AP PT Telekomunikasi Indonesia, ID

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

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

    Bad AS  Designation  Net Originated      Transit AS  Transit AS Name
     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              174  COGENT-174, US
     54338  UNALLOCATED  8.33.241.0/24             6461  ZAYO-6461, US
     23061  UNALLOCATED  8.39.119.0/24             3356  LEVEL3, US
      1782  UNALLOCATED  8.42.19.0/24             46887  LIGHTOWER, 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 http://thyme.rand.apnic.net/current/data-badAS

Prefixes from private and non-routed address space (Global)
-----------------------------------------------------------

Prefix                Origin AS  Description
192.88.99.0/24             6939  HURRICANE, US

Complete listing at http://thyme.rand.apnic.net/current/data-dsua

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

Unassigned Network     ASN Information  AS Name
23.132.208.0/24      Origin:      7850  CITYLINKFIBER, US
23.132.208.0/24     Transit:     15164  UPNLLC, 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:       174  COGENT-174, US
41.57.124.0/23       Origin:     37442  UNASSIGNED
41.57.124.0/23      Transit:     37204  TELONE, ZW

Complete listing at http://thyme.rand.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      /11:102     /12:304     
/13:595     /14:1214    /15:2038    /16:13601   /17:8302    /18:14027   
/19:25402   /20:42568   /21:50920   /22:106881  /23:92259   /24:504437  
/25:1455    /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        5810        6885  UNI2-AS, ES
 11492        3661        4722  CABLEONE, US
  8151        3186        8813  Uninet S.A. de C.V., MX
  6327        3176        3368  SHAW, CA
  7155        3037        3949  VIASAT-SP-BACKBONE, US
 22773        2998        4038  ASN-CXA-ALL-CCI-22773-RDC, US
 39891        2805        3269  ALJAWWALSTC-AS, SA
  8551        2750        3284  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
 30036        2244        2591  MEDIACOM-ENTERPRISE-BUSINESS, US
 11830        1929        2495  Instituto Costarricense de Electricidad y Telec

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

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

   1:1915      2:1076      3:145       4:20        5:3647      6:83     
   7:5         8:1540      9:1        11:164      12:1735     13:384    
  14:2284     15:109      16:24       17:356      18:108      20:126    
  21:4        22:188      23:5143     24:2450     25:2        27:2534   
  29:19       31:2336     32:112      34:1        35:47       36:1729   
  37:3908     38:2249     39:599      40:165      41:3820     42:990    
  43:2045     44:286      45:15480    46:3736     47:354      48:6      
  49:1657     50:1821     51:101      52:1285     54:249      55:746    
  56:4        57:54       58:1733     59:1194     60:931      61:2309   
  62:2298     63:1967     64:5357     65:2358     66:4987     67:2868   
  68:1160     69:4123     70:1362     71:677      72:3150     74:2620   
  75:1490     76:695      77:2027     78:1694     79:2617     80:1875   
  81:1537     82:1364     83:1155     84:1299     85:2829     86:726    
  87:1837     88:972      89:3016     90:503      91:7375     92:1847   
  93:2549     94:3158     95:3485     96:1304     97:345      98:976    
  99:959     100:76      101:1057    102:1671    103:26978   104:4009   
 105:437     106:810     107:2339    108:729     109:3873    110:2040   
 111:3126    112:1943    113:1405    114:1471    115:1918    116:1858   
 117:2403    118:2309    119:1889    120:1560    121:1076    122:2535   
 123:2165    124:1595    125:2082    128:1352    129:1346    130:890    
 131:2018    132:777     133:362     134:1858    135:312     136:787    
 137:853     138:2391    139:1188    140:758     141:1235    142:1204   
 143:1367    144:1269    145:324     146:1554    147:1415    148:2164   
 149:1513    150:824     151:1089    152:1644    153:429     154:3081   
 155:1342    156:1838    157:1226    158:1002    159:2023    160:2375   
 161:1257    162:3389    163:1101    164:1549    165:1432    166:592    
 167:1661    168:3658    169:690     170:4347    171:801     172:2753   
 173:2940    174:1001    175:1113    176:3294    177:4470    178:3003   
 179:1905    180:2267    181:2668    182:3265    183:2011    184:2418   
 185:18894   186:4251    187:3162    188:3332    189:2882    190:8691   
 191:1343    192:10740   193:8344    194:6808    195:4849    196:2896   
 197:2123    198:6029    199:5948    200:7374    201:5439    202:10504  
 203:10031   204:4511    205:3376    206:3778    207:3358    208:4026   
 209:4758    210:4185    211:2358    212:3771    213:3404    214:1162   
 215:64      216:6386    217:2605    218:1215    219:666     220:1950   
 221:979     222:851     223:2075   

End of report


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