[SANOG] Weekly Global IPv4 Routing Table Report

Routing Analysis Role Account cscora at apnic.net
Fri Oct 15 18:03:03 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 16 Oct, 2021

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

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

BGP routing table entries examined:                              866541
    Prefixes after maximum aggregation (per Origin AS):          329021
    Deaggregation factor:                                          2.63
    Unique aggregates announced (without unneeded subnets):      418843
Total ASes present in the Internet Routing Table:                 72090
    Prefixes per ASN:                                             12.02
Origin-only ASes present in the Internet Routing Table:           61921
Origin ASes announcing only one prefix:                           25538
Transit ASes present in the Internet Routing Table:               10169
Transit-only ASes present in the Internet Routing Table:            346
Average AS path length visible in the Internet Routing Table:       4.4
    Max AS path length visible:                                      53
    Max AS path prepend of ASN (265020)                              50
Prefixes from unregistered ASNs in the Routing Table:               949
    Number of instances of unregistered ASNs:                       953
Number of 32-bit ASNs allocated by the RIRs:                      37511
Number of 32-bit ASNs visible in the Routing Table:               31156
Prefixes from 32-bit ASNs in the Routing Table:                  144954
Number of bogon 32-bit ASNs visible in the Routing Table:            22
Special use prefixes present in the Routing Table:                    1
Prefixes being announced from unallocated address space:            453
Number of addresses announced to Internet:                   3071273216
    Equivalent to 183 /8s, 15 /16s and 233 /24s
    Percentage of available address space announced:               83.0
    Percentage of allocated address space announced:               83.0
    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:      287833

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

Prefixes being announced by APNIC Region ASes:                   231909
    Total APNIC prefixes after maximum aggregation:               66335
    APNIC Deaggregation factor:                                    3.50
Prefixes being announced from the APNIC address blocks:          227300
    Unique aggregates announced from the APNIC address blocks:    92166
APNIC Region origin ASes present in the Internet Routing Table:   12027
    APNIC Prefixes per ASN:                                       18.90
APNIC Region origin ASes announcing only one prefix:               3424
APNIC Region transit ASes present in the Internet Routing Table:   1698
Average APNIC Region AS path length visible:                        4.6
    Max APNIC Region AS path length visible:                         37
Number of APNIC region 32-bit ASNs visible in the Routing Table:   7196
Number of APNIC addresses announced to Internet:              772900480
    Equivalent to 46 /8s, 17 /16s and 134 /24s
APNIC AS Blocks        4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations)  23552-24575, 37888-38911, 45056-46079, 55296-56319,
                       58368-59391, 63488-64098, 64297-64395, 131072-147769
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:                    254057
    Total ARIN prefixes after maximum aggregation:               116852
    ARIN Deaggregation factor:                                     2.17
Prefixes being announced from the ARIN address blocks:           254037
    Unique aggregates announced from the ARIN address blocks:    121712
ARIN Region origin ASes present in the Internet Routing Table:    18900
    ARIN Prefixes per ASN:                                        13.44
ARIN Region origin ASes announcing only one prefix:                6843
ARIN Region transit ASes present in the Internet Routing Table:    1946
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:    4157
Number of ARIN addresses announced to Internet:              1301327616
    Equivalent to 77 /8s, 144 /16s and 175 /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:                    241320
    Total RIPE prefixes after maximum aggregation:               113069
    RIPE Deaggregation factor:                                     2.13
Prefixes being announced from the RIPE address blocks:           237460
    Unique aggregates announced from the RIPE address blocks:    145857
RIPE Region origin ASes present in the Internet Routing Table:    28082
    RIPE Prefixes per ASN:                                         8.46
RIPE Region origin ASes announcing only one prefix:               12098
RIPE Region transit ASes present in the Internet Routing Table:    3905
Average RIPE Region AS path length visible:                         4.4
    Max RIPE Region AS path length visible:                          29
Number of RIPE region 32-bit ASNs visible in the Routing Table:   10464
Number of RIPE addresses announced to Internet:               711908736
    Equivalent to 42 /8s, 110 /16s and 221 /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:                  111706
    Total LACNIC prefixes after maximum aggregation:              26844
    LACNIC Deaggregation factor:                                   4.16
Prefixes being announced from the LACNIC address blocks:         112587
    Unique aggregates announced from the LACNIC address blocks:   47589
LACNIC Region origin ASes present in the Internet Routing Table:  10781
    LACNIC Prefixes per ASN:                                      10.44
LACNIC Region origin ASes announcing only one prefix:              2629
LACNIC Region transit ASes present in the Internet Routing Table:  2131
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:  8450
Number of LACNIC addresses announced to Internet:             176566272
    Equivalent to 10 /8s, 134 /16s and 48 /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:                  26600
    Total AfriNIC prefixes after maximum aggregation:              5210
    AfriNIC Deaggregation factor:                                  5.11
Prefixes being announced from the AfriNIC address blocks:         34704
    Unique aggregates announced from the AfriNIC address blocks:  11141
AfriNIC Region origin ASes present in the Internet Routing Table:  1559
    AfriNIC Prefixes per ASN:                                     22.26
AfriNIC Region origin ASes announcing only one prefix:              544
AfriNIC Region transit ASes present in the Internet Routing Table:  312
Average AfriNIC Region AS path length visible:                      5.1
    Max AfriNIC Region AS path length visible:                       38
Number of AfriNIC region 32-bit ASNs visible in the Routing Table:  889
Number of AfriNIC addresses announced to Internet:            108256000
    Equivalent to 6 /8s, 115 /16s and 219 /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        8044       9000      57  CMNET-GD Guangdong Mobile Communication
  7545        5852        787     682  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4661       4192      74  ERX-CERNET-BKB China Education and Rese
  7552        3617       1330      20  VIETEL-AS-AP Viettel Group, VN
  7713        3505       1022      56  TELKOMNET-AS-AP PT Telekomunikasi Indon
 45899        3039       1896      55  VNPT-AS-VN VNPT Corp, VN
  4766        2507      11119     578  KIXS-AS-KR Korea Telecom, KR
  9498        2162        472     237  BBIL-AP BHARTI Airtel Ltd., IN
 45090        2127       1198      75  CNNIC-TENCENT-NET-AP Shenzhen Tencent C
  4755        2126        429     203  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        5764       9986    2516  AMAZON-02, US
 11492        4675        309     786  CABLEONE, US
 22773        4086       3056     375  ASN-CXA-ALL-CCI-22773-RDC, US
  7155        3950        264      30  VIASAT-SP-BACKBONE, US
 16625        3638       1882    2536  AKAMAI-AS, US
  6327        3371       1318      69  SHAW, CA
 30036        2576        373     244  MEDIACOM-ENTERPRISE-BUSINESS, US
   209        2531       5028     450  CENTURYLINK-US-LEGACY-QWEST, US
 20115        2242       3032     504  CHARTER-20115, US
  7018        2235      24164    1427  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        6845       1726     143  UNI2-AS, ES
 20940        3878       3348     216  AKAMAI-ASN1, NL
  8551        3289        378      39  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
 39891        3271        187      23  ALJAWWALSTC-AS, SA
 12389        2929       2283     898  ROSTELECOM-AS, RU
  9009        2491        259    1315  M247, GB
 34984        2240        358     602  TELLCOM-AS, TR
 58224        1691        901     579  TCI, IR
 61317        1656        241     917  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        8874       3458     571  Uninet S.A. de C.V., MX
 10620        3415        520     717  Telmex Colombia S.A., CO
 11830        2498        369      62  Instituto Costarricense de Electricidad
 13999        1669        330     465  Mega Cable, S.A. de C.V., MX
  6503        1522        359     477  Axtel, S.A.B. de C.V., MX
 28573        1465       2309     244  CLARO S.A., BR
  3816        1240        651     153  COLOMBIA TELECOMUNICACIONES S.A. ESP, C
 26615        1119       2351     135  TIM SA, BR
  6147        1088        369      22  Telefonica del Peru S.A.A., PE
 11172         956        111      69  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        1550        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         509         50      31  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        8874       3458     571  Uninet S.A. de C.V., MX
  9808        8044       9000      57  CMNET-GD Guangdong Mobile Communication
 12479        6845       1726     143  UNI2-AS, ES
  7545        5852        787     682  TPG-INTERNET-AP TPG Telecom Limited, AU
 16509        5764       9986    2516  AMAZON-02, US
 11492        4675        309     786  CABLEONE, US
  4538        4661       4192      74  ERX-CERNET-BKB China Education and Rese
 22773        4086       3056     375  ASN-CXA-ALL-CCI-22773-RDC, US
  7155        3950        264      30  VIASAT-SP-BACKBONE, US
 20940        3878       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        8044         7987  CMNET-GD Guangdong Mobile Communication Co.Ltd.
 12479        6845         6702  UNI2-AS, ES
  7545        5852         5170  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4661         4587  ERX-CERNET-BKB China Education and Research Net
  7155        3950         3920  VIASAT-SP-BACKBONE, US
 11492        4675         3889  CABLEONE, US
 22773        4086         3711  ASN-CXA-ALL-CCI-22773-RDC, US
 20940        3878         3662  AKAMAI-ASN1, NL
  7552        3617         3597  VIETEL-AS-AP Viettel Group, VN
  7713        3505         3449  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
23.141.0.0/24        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      /11:99      /12:300     
/13:597     /14:1216    /15:2046    /16:13596   /17:8321    /18:14067   
/19:25507   /20:42772   /21:51099   /22:107303  /23:92738   /24:505363  
/25:1447    /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        5806        6845  UNI2-AS, ES
 11492        3616        4675  CABLEONE, US
  8151        3265        8874  Uninet S.A. de C.V., MX
  6327        3179        3371  SHAW, CA
  7155        3040        3950  VIASAT-SP-BACKBONE, US
 22773        3018        4086  ASN-CXA-ALL-CCI-22773-RDC, US
 39891        2807        3271  ALJAWWALSTC-AS, SA
  8551        2755        3289  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
 30036        2229        2576  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)
----------------------------------------------

   1:1926      2:1052      3:145       4:19        5:3647      6:85     
   7:5         8:1552      9:1        11:172      12:1717     13:406    
  14:2295     15:115      16:24       17:370      18:125      20:126    
  21:4        22:188      23:5189     24:2430     25:2        27:2551   
  29:19       31:2359     32:112      34:1        35:47       36:1727   
  37:3899     38:2296     39:611      40:151      41:3838     42:1039   
  43:2063     44:293      45:15456    46:3673     47:320      48:3      
  49:1677     50:1835     51:100      52:1301     54:248      55:739    
  56:4        57:55       58:1741     59:1181     60:937      61:2288   
  62:2330     63:1964     64:5369     65:2354     66:4953     67:2866   
  68:1162     69:4121     70:1360     71:678      72:3156     74:2620   
  75:1492     76:694      77:2036     78:1734     79:2630     80:1864   
  81:1527     82:1381     83:1164     84:1294     85:2819     86:718    
  87:1859     88:977      89:3043     90:508      91:7372     92:1829   
  93:2563     94:3139     95:3541     96:1297     97:347      98:978    
  99:949     100:75      101:1041    102:1711    103:27145   104:4058   
 105:439     106:827     107:2379    108:734     109:3866    110:2041   
 111:3098    112:1940    113:1410    114:1472    115:1931    116:1897   
 117:2424    118:2314    119:1893    120:1563    121:1079    122:2536   
 123:2167    124:1600    125:2048    128:1386    129:1304    130:904    
 131:2024    132:745     133:364     134:1862    135:318     136:791    
 137:856     138:2400    139:1190    140:721     141:1267    142:1197   
 143:1373    144:1267    145:326     146:1555    147:1428    148:2209   
 149:1489    150:831     151:1087    152:1653    153:429     154:3160   
 155:1334    156:1757    157:1187    158:1004    159:2045    160:2342   
 161:1244    162:3349    163:1083    164:1629    165:1467    166:592    
 167:1657    168:3645    169:689     170:4340    171:807     172:2760   
 173:2958    174:1000    175:1116    176:3344    177:4539    178:3009   
 179:1915    180:2255    181:2679    182:3121    183:2011    184:2417   
 185:18926   186:4209    187:3173    188:3444    189:2906    190:8633   
 191:1314    192:10695   193:8382    194:6845    195:4871    196:2890   
 197:2132    198:6031    199:5926    200:7335    201:5492    202:10488  
 203:10061   204:4512    205:3387    206:4062    207:3354    208:3996   
 209:4735    210:4199    211:2354    212:3750    213:3371    214:1165   
 215:61      216:6376    217:2624    218:1219    219:650     220:1947   
 221:977     222:853     223:2052   

End of report


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