[SANOG] Weekly Global IPv4 Routing Table Report

Routing Table Analysis Role Account cscora at apnic.net
Fri Jan 14 18:03:01 UTC 2022


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

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

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

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

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

IPv4 Routing Table Report   04:00 +10GMT Sat 15 Jan, 2022

  BGP Table (Global) as seen in Japan.

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

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

BGP routing table entries examined:                              885121
    Prefixes after maximum aggregation (per Origin AS):          333219
    Deaggregation factor:                                          2.66
    Unique aggregates announced (without unneeded subnets):      425456
Total ASes present in the Internet Routing Table:                 72620
    Prefixes per ASN:                                             12.19
Origin-only ASes present in the Internet Routing Table:           62321
Origin ASes announcing only one prefix:                           25693
Transit ASes present in the Internet Routing Table:               10299
Transit-only ASes present in the Internet Routing Table:            377
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:               910
    Number of instances of unregistered ASNs:                       914
Number of 32-bit ASNs allocated by the RIRs:                      38307
Number of 32-bit ASNs visible in the Routing Table:               31840
Prefixes from 32-bit ASNs in the Routing Table:                  148041
Number of bogon 32-bit ASNs visible in the Routing Table:            23
Special use prefixes present in the Routing Table:                    1
Prefixes being announced from unallocated address space:            568
Number of addresses announced to Internet:                   3074313728
    Equivalent to 183 /8s, 62 /16s and 78 /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:      299471

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

Prefixes being announced by APNIC Region ASes:                   232790
    Total APNIC prefixes after maximum aggregation:               65474
    APNIC Deaggregation factor:                                    3.56
Prefixes being announced from the APNIC address blocks:          227581
    Unique aggregates announced from the APNIC address blocks:    93678
APNIC Region origin ASes present in the Internet Routing Table:   12263
    APNIC Prefixes per ASN:                                       18.56
APNIC Region origin ASes announcing only one prefix:               3490
APNIC Region transit ASes present in the Internet Routing Table:   1704
Average APNIC Region AS path length visible:                        4.5
    Max APNIC Region AS path length visible:                         27
Number of APNIC region 32-bit ASNs visible in the Routing Table:   7446
Number of APNIC addresses announced to Internet:              774476672
    Equivalent to 46 /8s, 41 /16s and 147 /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:                    257494
    Total ARIN prefixes after maximum aggregation:               118531
    ARIN Deaggregation factor:                                     2.17
Prefixes being announced from the ARIN address blocks:           257375
    Unique aggregates announced from the ARIN address blocks:    122888
ARIN Region origin ASes present in the Internet Routing Table:    18930
    ARIN Prefixes per ASN:                                        13.60
ARIN Region origin ASes announcing only one prefix:                6862
ARIN Region transit ASes present in the Internet Routing Table:    1950
Average ARIN Region AS path length visible:                         3.8
    Max ARIN Region AS path length visible:                          34
Number of ARIN region 32-bit ASNs visible in the Routing Table:    4286
Number of ARIN addresses announced to Internet:              1300451328
    Equivalent to 77 /8s, 131 /16s and 80 /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:                    252847
    Total RIPE prefixes after maximum aggregation:               116069
    RIPE Deaggregation factor:                                     2.18
Prefixes being announced from the RIPE address blocks:           249215
    Unique aggregates announced from the RIPE address blocks:    148413
RIPE Region origin ASes present in the Internet Routing Table:    28168
    RIPE Prefixes per ASN:                                         8.85
RIPE Region origin ASes announcing only one prefix:               12135
RIPE Region transit ASes present in the Internet Routing Table:    3969
Average RIPE Region AS path length visible:                         4.3
    Max RIPE Region AS path length visible:                          32
Number of RIPE region 32-bit ASNs visible in the Routing Table:   10598
Number of RIPE addresses announced to Internet:               713844352
    Equivalent to 42 /8s, 140 /16s and 102 /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:                  113593
    Total LACNIC prefixes after maximum aggregation:              27175
    LACNIC Deaggregation factor:                                   4.18
Prefixes being announced from the LACNIC address blocks:         114409
    Unique aggregates announced from the LACNIC address blocks:   48485
LACNIC Region origin ASes present in the Internet Routing Table:  10909
    LACNIC Prefixes per ASN:                                      10.49
LACNIC Region origin ASes announcing only one prefix:              2661
LACNIC Region transit ASes present in the Internet Routing Table:  2197
Average LACNIC Region AS path length visible:                       5.0
    Max LACNIC Region AS path length visible:                        53
Number of LACNIC region 32-bit ASNs visible in the Routing Table:  8591
Number of LACNIC addresses announced to Internet:             176636672
    Equivalent to 10 /8s, 135 /16s and 67 /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:                  27487
    Total AfriNIC prefixes after maximum aggregation:              5281
    AfriNIC Deaggregation factor:                                  5.20
Prefixes being announced from the AfriNIC address blocks:         35973
    Unique aggregates announced from the AfriNIC address blocks:  11486
AfriNIC Region origin ASes present in the Internet Routing Table:  1582
    AfriNIC Prefixes per ASN:                                     22.74
AfriNIC Region origin ASes announcing only one prefix:              545
AfriNIC Region transit ASes present in the Internet Routing Table:  308
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:  919
Number of AfriNIC addresses announced to Internet:            108532480
    Equivalent to 6 /8s, 120 /16s and 19 /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        8726       8919      50  CHINAMOBILE-CN China Mobile Communicati
  7545        5842        787     680  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4689       4192      74  ERX-CERNET-BKB China Education and Rese
  7552        3611       1330      20  VIETEL-AS-AP Viettel Group, VN
  7713        3492       1038      51  TELKOMNET-AS-AP PT Telekomunikasi Indon
 45899        3426       1880      57  VNPT-AS-VN VNPT Corp, VN
  4766        2517      11120     602  KIXS-AS-KR Korea Telecom, KR
  9498        2228        474     231  BBIL-AP BHARTI Airtel Ltd., IN
 45090        2163       1438      79  TENCENT-NET-AP Shenzhen Tencent Compute
  4755        2118        429     199  TATACOMM-AS TATA Communications formerl

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

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

   ASN  No of nets  /20 equiv  MaxAgg  Description
 16509        6090      10131    2623  AMAZON-02, US
 11492        4597        304     768  CABLEONE, US
 22773        4022       3030     376  ASN-CXA-ALL-CCI-22773-RDC, US
  7155        3951        264      30  VIASAT-SP-BACKBONE, US
 16625        3672       1894    2566  AKAMAI-AS, US
  6327        3348       1318      63  SHAW, CA
   749        2889      50784    2145  DNIC-AS-00749, US
 30036        2608        374     127  MEDIACOM-ENTERPRISE-BUSINESS, US
   209        2512       5042     429  CENTURYLINK-US-LEGACY-QWEST, US
 20115        2247       3035     507  CHARTER-20115, US

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

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

   ASN  No of nets  /20 equiv  MaxAgg  Description
 12479        6829       1730     150  UNI2-AS, ES
  9121        6718       1692      17  TTNET, TR
 20940        3877       3348     210  AKAMAI-ASN1, NL
  8551        3776        378      39  BEZEQ-INTERNATIONAL-AS Bezeqint Interne
 39891        3271        187      23  ALJAWWALSTC-AS, SA
 12389        2951       2286     903  ROSTELECOM-AS, RU
  9009        2478        253    1295  M247, GB
 34984        2216        357     602  TELLCOM-AS, TR
 47331        1963        314    1495  TTNET, TR
 58224        1777        925     589  TCI, IR

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       10222       3463     575  Uninet S.A. de C.V., MX
 10620        3442        519     715  Telmex Colombia S.A., CO
 11830        2464        369      62  Instituto Costarricense de Electricidad
 13999        1641        283     463  Mega Cable, S.A. de C.V., MX
  6503        1440        354     524  Axtel, S.A.B. de C.V., MX
 28573        1393       2326     253  CLARO S.A., BR
  3816        1245        658     146  COLOMBIA TELECOMUNICACIONES S.A. ESP, C
 26615        1146       2350     138  TIM SA, BR
  6147        1092        369      21  Telefonica del Peru S.A.A., PE
 11664         994        191     443  Techtel LMDS Comunicaciones Interactiva

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

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

   ASN  No of nets  /20 equiv  MaxAgg  Description
 24863        1640        393      21  LINKdotNET-AS, EG
 24835        1547        515      32  RAYA-AS, EG
 36992        1299       1518     262  ETISALAT-MISR, EG
 36903        1195        543     114  MT-MPLS, MA
 29571         871         68      12  ORANGE-COTE-IVOIRE, CI
 36935         734        521      39  Vodafone-, EG
  6713         612       1863      34  IAM-AS, MA
 15399         519         50      33  WANANCHI-, KE
 37342         468         32       1  MOVITEL, MZ
 23889         428        232      16  MauritiusTelecom, MU

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

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

   ASN  No of nets  /20 equiv  MaxAgg  Description
  8151       10222       3463     575  Uninet S.A. de C.V., MX
  9808        8726       8919      50  CHINAMOBILE-CN China Mobile Communicati
 12479        6829       1730     150  UNI2-AS, ES
  9121        6718       1692      17  TTNET, TR
 16509        6090      10131    2623  AMAZON-02, US
  7545        5842        787     680  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4689       4192      74  ERX-CERNET-BKB China Education and Rese
 11492        4597        304     768  CABLEONE, US
 22773        4022       3030     376  ASN-CXA-ALL-CCI-22773-RDC, US
  7155        3951        264      30  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        8726         8676  CHINAMOBILE-CN China Mobile Communications Grou
  9121        6718         6701  TTNET, TR
 12479        6829         6679  UNI2-AS, ES
  7545        5842         5162  TPG-INTERNET-AP TPG Telecom Limited, AU
  4538        4689         4615  ERX-CERNET-BKB China Education and Research Net
  7155        3951         3921  VIASAT-SP-BACKBONE, US
 11492        4597         3829  CABLEONE, US
  8551        3776         3737  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
 20940        3877         3667  AKAMAI-ASN1, NL
 22773        4022         3646  ASN-CXA-ALL-CCI-22773-RDC, US

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
     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
     32848  UNALLOCATED  8.28.72.0/24              3356  LEVEL3, US
    394936  UNALLOCATED  8.33.224.0/24            22442  HOU-PHONOSCOPE, US
     54338  UNALLOCATED  8.33.241.0/24             6461  ZAYO-6461, US
      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

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
23.141.0.0/24        Origin:    395350  UNASSIGNED
23.141.0.0/24       Transit:     11426  TWC-11426-CAROLINAS, US
23.252.160.0/24      Origin:    398968  GROUP-IID-01, US
23.252.160.0/24     Transit:       174  COGENT-174, US
23.252.161.0/24      Origin:    398968  GROUP-IID-01, US
23.252.161.0/24     Transit:       174  COGENT-174, US
23.252.162.0/24      Origin:    398968  GROUP-IID-01, US
23.252.162.0/24     Transit:       174  COGENT-174, US
23.252.163.0/24      Origin:    398968  GROUP-IID-01, US
23.252.163.0/24     Transit:       174  COGENT-174, US

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

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

 /1:0        /2:0        /3:0        /4:0        /5:0        /6:0       
 /7:0        /8:16       /9:13      /10:41      /11:102     /12:305     
/13:593     /14:1214    /15:2038    /16:13569   /17:8320    /18:13875   
/19:25171   /20:43230   /21:51779   /22:108388  /23:94988   /24:520689  
/25:790     /26:0       /27:0       /28:0       /29:0       /30:0       
/31:0       /32:0       

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

   ASN  No of nets  Total ann.  Description
  9121        5893        6718  TTNET, TR
 12479        5777        6829  UNI2-AS, ES
  8151        4195       10222  Uninet S.A. de C.V., MX
 11492        3532        4597  CABLEONE, US
  8551        3241        3776  BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbo
  6327        3159        3348  SHAW, CA
  7155        3041        3951  VIASAT-SP-BACKBONE, US
 22773        3002        4022  ASN-CXA-ALL-CCI-22773-RDC, US
 39891        2807        3271  ALJAWWALSTC-AS, SA
 30036        2263        2608  MEDIACOM-ENTERPRISE-BUSINESS, US

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

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

   1:1902      2:997       3:153       4:7         5:3701      6:101    
   7:5         8:1557      9:1        11:172      12:1705     13:407    
  14:2361     15:145      16:39       17:374      18:129      20:165    
  21:4        22:188      23:5398     24:2374     25:4        27:2585   
  29:19       31:2407     32:104      34:1        35:50       36:1733   
  37:3926     38:2459     39:737      40:149      41:3913     42:1067   
  43:2100     44:294      45:15969    46:3876     47:302      49:1635   
  50:1905     51:107      52:1345     54:293      55:733      56:8      
  57:55       58:1767     59:1138     60:953      61:2255     62:2418   
  63:1936     64:5366     65:2321     66:4927     67:2930     68:1182   
  69:4171     70:1346     71:677      72:3068     74:2628     75:1516   
  76:715      77:2170     78:3800     79:2882     80:1915     81:1654   
  82:1444     83:1196     84:1324     85:3587     86:708      87:1882   
  88:2617     89:3142     90:498      91:7528     92:1893     93:2595   
  94:3266     95:4493     96:1313     97:344      98:991      99:863    
 100:75      101:1049    102:1865    103:27974   104:4113    105:459    
 106:841     107:2431    108:747     109:4164    110:2053    111:3179   
 112:1956    113:1533    114:1531    115:1944    116:1890    117:2499   
 118:2320    119:1850    120:1661    121:1029    122:2530    123:2114   
 124:1615    125:2062    128:1362    129:1150    130:916     131:2085   
 132:758     133:367     134:1927    135:285     136:849     137:862    
 138:2469    139:1220    140:868     141:1334    142:1247    143:1424   
 144:1229    145:336     146:1751    147:1466    148:2210    149:1653   
 150:856     151:1080    152:1785    153:446     154:3678    155:1360   
 156:1864    157:1209    158:998     159:2002    160:2386    161:1260   
 162:3420    163:1185    164:1663    165:1530    166:624     167:1678   
 168:3674    169:687     170:4310    171:824     172:2956    173:3048   
 174:1015    175:1124    176:3460    177:4574    178:3022    179:2001   
 180:2286    181:2848    182:3215    183:1926    184:2416    185:19184  
 186:4267    187:3508    188:3764    189:3101    190:8857    191:1331   
 192:10990   193:8478    194:6941    195:4978    196:2909    197:2381   
 198:5971    199:5992    200:7465    201:5655    202:10465   203:10015  
 204:4521    205:3379    206:3841    207:3377    208:3995    209:4592   
 210:4229    211:2449    212:3913    213:3375    214:1160    215:64     
 216:6386    217:2627    218:1226    219:607     220:1958    221:983    
 222:860     223:2153   

End of report


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