[SANOG] Weekly Global IPv4 Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri Oct 8 18:03:29 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 09 Oct, 2021

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

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

BGP routing table entries examined:                              865799
    Prefixes after maximum aggregation (per Origin AS):          328037
    Deaggregation factor:                                          2.64
    Unique aggregates announced (without unneeded subnets):      417220
Total ASes present in the Internet Routing Table:                 72037
    Prefixes per ASN:                                             12.02
Origin-only ASes present in the Internet Routing Table:           61895
Origin ASes announcing only one prefix:                           25518
Transit ASes present in the Internet Routing Table:               10142
Transit-only ASes present in the Internet Routing Table:            342
Average AS path length visible in the Internet Routing Table:       4.3
    Max AS path length visible:                                      53
    Max AS path prepend of ASN (265020)                              50
Prefixes from unregistered ASNs in the Routing Table:               977
    Number of instances of unregistered ASNs:                       981
Number of 32-bit ASNs allocated by the RIRs:                      37427
Number of 32-bit ASNs visible in the Routing Table:               31091
Prefixes from 32-bit ASNs in the Routing Table:                  144662
Number of bogon 32-bit ASNs visible in the Routing Table:            28
Special use prefixes present in the Routing Table:                    1
Prefixes being announced from unallocated address space:            515
Number of addresses announced to Internet:                   3069966592
    Equivalent to 182 /8s, 251 /16s and 249 /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:               99.5
Total number of prefixes smaller than registry allocations:      287724

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

Prefixes being announced by APNIC Region ASes:                   231808
    Total APNIC prefixes after maximum aggregation:               66263
    APNIC Deaggregation factor:                                    3.50
Prefixes being announced from the APNIC address blocks:          227275
    Unique aggregates announced from the APNIC address blocks:    92050
APNIC Region origin ASes present in the Internet Routing Table:   12003
    APNIC Prefixes per ASN:                                       18.93
APNIC Region origin ASes announcing only one prefix:               3416
APNIC Region transit ASes present in the Internet Routing Table:   1688
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:   7169
Number of APNIC addresses announced to Internet:              772148352
    Equivalent to 46 /8s, 6 /16s and 12 /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:                    253515
    Total ARIN prefixes after maximum aggregation:               116297
    ARIN Deaggregation factor:                                     2.18
Prefixes being announced from the ARIN address blocks:           253446
    Unique aggregates announced from the ARIN address blocks:    120928
ARIN Region origin ASes present in the Internet Routing Table:    18893
    ARIN Prefixes per ASN:                                        13.41
ARIN Region origin ASes announcing only one prefix:                6851
ARIN Region transit ASes present in the Internet Routing Table:    1943
Average ARIN Region AS path length visible:                         3.8
    Max ARIN Region AS path length visible:                          28
Number of ARIN region 32-bit ASNs visible in the Routing Table:    4146
Number of ARIN addresses announced to Internet:              1301072384
    Equivalent to 77 /8s, 140 /16s and 202 /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:                    241164
    Total RIPE prefixes after maximum aggregation:               112909
    RIPE Deaggregation factor:                                     2.14
Prefixes being announced from the RIPE address blocks:           237322
    Unique aggregates announced from the RIPE address blocks:    145502
RIPE Region origin ASes present in the Internet Routing Table:    28061
    RIPE Prefixes per ASN:                                         8.46
RIPE Region origin ASes announcing only one prefix:               12083
RIPE Region transit ASes present in the Internet Routing Table:    3896
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:   10443
Number of RIPE addresses announced to Internet:               711814272
    Equivalent to 42 /8s, 109 /16s and 108 /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:                  111884
    Total LACNIC prefixes after maximum aggregation:              26638
    LACNIC Deaggregation factor:                                   4.20
Prefixes being announced from the LACNIC address blocks:         112798
    Unique aggregates announced from the LACNIC address blocks:   47315
LACNIC Region origin ASes present in the Internet Routing Table:  10781
    LACNIC Prefixes per ASN:                                      10.46
LACNIC Region origin ASes announcing only one prefix:              2628
LACNIC Region transit ASes present in the Internet Routing Table:  2135
Average LACNIC Region AS path length visible:                       4.9
    Max LACNIC Region AS path length visible:                        53
Number of LACNIC region 32-bit ASNs visible in the Routing Table:  8454
Number of LACNIC addresses announced to Internet:             176666880
    Equivalent to 10 /8s, 135 /16s and 185 /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:                  26451
    Total AfriNIC prefixes after maximum aggregation:              5204
    AfriNIC Deaggregation factor:                                  5.08
Prefixes being announced from the AfriNIC address blocks:         34443
    Unique aggregates announced from the AfriNIC address blocks:  10996
AfriNIC Region origin ASes present in the Internet Routing Table:  1548
    AfriNIC Prefixes per ASN:                                     22.25
AfriNIC Region origin ASes announcing only one prefix:              540
AfriNIC Region transit ASes present in the Internet Routing Table:  306
Average AfriNIC Region AS path length visible:                      5.1
    Max AfriNIC Region AS path length visible:                       42
Number of AfriNIC region 32-bit ASNs visible in the Routing Table:  879
Number of AfriNIC addresses announced to Internet:            107914496
    Equivalent to 6 /8s, 110 /16s and 165 /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        8045       9000      57  CMNET-GD Guangdong Mobile Communication
  7545        5835        786     680  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4713       4192      74  ERX-CERNET-BKB China Education and Rese
  7552        3619       1330      20  VIETEL-AS-AP Viettel Group, VN
  7713        3494       1022      56  TELKOMNET-AS-AP PT Telekomunikasi Indon
 45899        3027       1896      55  VNPT-AS-VN VNPT Corp, VN
  4766        2505      11119     576  KIXS-AS-KR Korea Telecom, KR
  9498        2173        472     237  BBIL-AP BHARTI Airtel Ltd., IN
 45090        2127       1198      75  CNNIC-TENCENT-NET-AP Shenzhen Tencent C
  4755        2126        437     202  TATACOMM-AS TATA Communications formerl

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        5665       9813    2489  AMAZON-02, US
 11492        4681        310     767  CABLEONE, US
 22773        4099       3057     383  ASN-CXA-ALL-CCI-22773-RDC, US
  7155        3950        264      30  VIASAT-SP-BACKBONE, US
 16625        3636       1880    2536  AKAMAI-AS, US
  6327        3374       1319      67  SHAW, CA
 30036        2588        374     179  MEDIACOM-ENTERPRISE-BUSINESS, US
   209        2533       5028     453  CENTURYLINK-US-LEGACY-QWEST, US
 20115        2241       3032     504  CHARTER-20115, US
  7018        2229      24160    1424  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        6846       1726     143  UNI2-AS, ES
 20940        3863       3348     214  AKAMAI-ASN1, NL
  8551        3277        378      39  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
 39891        3269        187      23  ALJAWWALSTC-AS, SA
 12389        2919       2279     896  ROSTELECOM-AS, RU
  9009        2485        258    1311  M247, GB
 34984        2233        358     603  TELLCOM-AS, TR
 58224        1681        899     581  TCI, IR
 61317        1637        257     912  ASDETUK www.heficed.com, GB
 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        8878       3459     570  Uninet S.A. de C.V., MX
 10620        3409        519     711  Telmex Colombia S.A., CO
 11830        2498        369      62  Instituto Costarricense de Electricidad
 13999        1698        337     462  Mega Cable, S.A. de C.V., MX
  6503        1522        359     477  Axtel, S.A.B. de C.V., MX
 28573        1465       2309     242  CLARO S.A., BR
  3816        1241        651     153  COLOMBIA TELECOMUNICACIONES S.A. ESP, C
 26615        1146       2351     136  TIM SA, BR
  6147        1090        370      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        1636        393      21  LINKdotNET-AS, EG
 24835        1529        503      32  RAYA-AS, EG
 36992        1287       1418     270  ETISALAT-MISR, EG
 36903        1183        537     110  MT-MPLS, MA
 29571         800         68      11  ORANGE-COTE-IVOIRE, CI
 36935         630        523      44  Vodafone-, EG
  6713         612       1863      34  IAM-AS, MA
 15399         504         50      30  WANANCHI-, KE
 37342         471         32       1  MOVITEL, MZ
  2018         344        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        8878       3459     570  Uninet S.A. de C.V., MX
  9808        8045       9000      57  CMNET-GD Guangdong Mobile Communication
 12479        6846       1726     143  UNI2-AS, ES
  7545        5835        786     680  TPG-INTERNET-AP TPG Telecom Limited, AU
 16509        5665       9813    2489  AMAZON-02, US
  4538        4713       4192      74  ERX-CERNET-BKB China Education and Rese
 11492        4681        310     767  CABLEONE, US
 22773        4099       3057     383  ASN-CXA-ALL-CCI-22773-RDC, US
  7155        3950        264      30  VIASAT-SP-BACKBONE, US
 20940        3863       3348     214  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        8045         7988  CMNET-GD Guangdong Mobile Communication Co.Ltd.
 12479        6846         6703  UNI2-AS, ES
  7545        5835         5155  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4713         4639  ERX-CERNET-BKB China Education and Research Net
  7155        3950         3920  VIASAT-SP-BACKBONE, US
 11492        4681         3914  CABLEONE, US
 22773        4099         3716  ASN-CXA-ALL-CCI-22773-RDC, US
 20940        3863         3649  AKAMAI-ASN1, NL
  7552        3619         3599  VIETEL-AS-AP Viettel Group, VN
  7713        3494         3438  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
    398418  UNALLOCATED  8.2.200.0/24              2914  NTT-COMMUNICATIONS-2914, US
     46990  UNALLOCATED  8.5.242.0/23              3356  LEVEL3, 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              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

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
23.136.80.0/24       Origin:     20119  ARROW, CA
23.136.80.0/24      Transit:      6939  HURRICANE, US
23.141.0.0/24        Origin:    395350  UNASSIGNED
23.141.0.0/24       Transit:     11426  TWC-11426-CAROLINAS, US
23.247.168.0/24      Origin:    142632  NASULEX-AS-AP Nasulex, NL
23.247.168.0/24     Transit:     53667  PONYNET, 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 

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      /11:99      /12:300     
/13:597     /14:1215    /15:2042    /16:13602   /17:8301    /18:14055   
/19:25519   /20:42808   /21:51147   /22:107029  /23:92523   /24:505038  
/25:1454    /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        5798        6846  UNI2-AS, ES
 11492        3620        4681  CABLEONE, US
  8151        3256        8878  Uninet S.A. de C.V., MX
  6327        3181        3374  SHAW, CA
  7155        3040        3950  VIASAT-SP-BACKBONE, US
 22773        3022        4099  ASN-CXA-ALL-CCI-22773-RDC, US
 39891        2805        3269  ALJAWWALSTC-AS, SA
  8551        2743        3277  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
 30036        2242        2588  MEDIACOM-ENTERPRISE-BUSINESS, US
 11830        1931        2498  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)
----------------------------------------------

   1:1927      2:1054      3:145       4:19        5:3654      6:85     
   7:5         8:1547      9:1        11:172      12:1712     13:391    
  14:2281     15:114      16:24       17:368      18:121      20:126    
  21:4        22:188      23:5169     24:2432     25:2        27:2559   
  29:19       31:2340     32:112      34:1        35:47       36:1718   
  37:3904     38:2269     39:602      40:151      41:3809     42:1037   
  43:2077     44:286      45:15493    46:3719     47:320      48:3      
  49:1678     50:1833     51:99       52:1288     54:247      55:711    
  56:4        57:54       58:1746     59:1186     60:933      61:2291   
  62:2265     63:1964     64:5373     65:2360     66:4948     67:2865   
  68:1158     69:4126     70:1361     71:678      72:3151     74:2614   
  75:1492     76:693      77:2030     78:1722     79:2607     80:1871   
  81:1537     82:1366     83:1158     84:1291     85:2833     86:725    
  87:1846     88:982      89:3058     90:499      91:7369     92:1843   
  93:2553     94:3165     95:3521     96:1300     97:347      98:975    
  99:960     100:75      101:1039    102:1690    103:27070   104:4063   
 105:438     106:823     107:2368    108:731     109:3871    110:2045   
 111:3130    112:1939    113:1409    114:1501    115:1934    116:1839   
 117:2410    118:2308    119:1893    120:1561    121:1080    122:2533   
 123:2170    124:1593    125:2051    128:1379    129:1314    130:899    
 131:2020    132:775     133:363     134:1862    135:318     136:792    
 137:862     138:2397    139:1192    140:761     141:1244    142:1180   
 143:1373    144:1266    145:326     146:1546    147:1443    148:2154   
 149:1509    150:831     151:1088    152:1659    153:427     154:3104   
 155:1327    156:1830    157:1183    158:1006    159:2035    160:2349   
 161:1247    162:3367    163:1083    164:1559    165:1445    166:593    
 167:1651    168:3647    169:682     170:4327    171:806     172:2750   
 173:2950    174:999     175:1121    176:3322    177:4542    178:3004   
 179:1920    180:2259    181:2669    182:3115    183:2011    184:2430   
 185:18917   186:4239    187:3178    188:3438    189:2900    190:8661   
 191:1299    192:10694   193:8370    194:6838    195:4878    196:2903   
 197:2124    198:6032    199:5926    200:7358    201:5488    202:10522  
 203:10083   204:4499    205:3379    206:4059    207:3352    208:4017   
 209:4735    210:4190    211:2362    212:3768    213:3364    214:1162   
 215:61      216:6354    217:2611    218:1219    219:670     220:1946   
 221:977     222:855     223:2050   

End of report


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