[REN-BGP-stats-all] IPv4 R&E Routing Table Report - ESnet (R&E) view

REN Routing Table Report cscora at bgp.nsrc.org
Wed Nov 1 22:20:37 UTC 2023


IPv4 R&E Routing Table Report   22:20 GMT Wed 01 Nov, 2023

  IPv4 BGP Table (R&E) as seen at ESnet.

Report Website:     https://bgp.nsrc.org/REN
Detailed Analysis:  https://bgp.nsrc.org/REN/ESnet/

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

BGP routing table entries examined:                               18440
    Prefixes after maximum aggregation (per Origin AS):           10618
    Deaggregation factor:                                          1.74
    Unique aggregates announced (without unneeded subnets):       11723
    Number of IPv4 prefixes with a valid ROA:                      4997
    Number of IPv4 prefixes with an invalid ROA:                     27
    Number of IPv4 prefixes with no ROA:                          13416
Total ASes present in the Internet Routing Table:                  2747
    Prefixes per ASN:                                              6.71
Origin-only ASes present in the Internet Routing Table:            2383
Origin ASes announcing only one prefix:                            1071
Transit ASes present in the Internet Routing Table:                 364
Transit-only ASes present in the Internet Routing Table:             66
Paths with bogon ASNs present in the IPv4 Routing Table:              0
Average AS path length visible in the Internet Routing Table:       3.7
    Max AS path length visible:                                      14
    Max AS path prepend of ASN ( 47805)                              11
Prefixes from unregistered ASNs in the Routing Table:                 3
    Number of instances of unregistered ASNs:                         3
Number of 32-bit ASNs allocated by the RIRs:                      42972
Number of 32-bit ASNs visible in the Routing Table:                 638
Prefixes from 32-bit ASNs in the Routing Table:                    1898
Number of bogon 32-bit ASNs visible in the Routing Table:             0
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:              2
Number of addresses announced to Internet:                    177342976
    Equivalent to 10 /8s, 146 /16s and 10 /24s
    Percentage of available address space announced:                4.8
    Percentage of allocated address space announced:                4.8
    Percentage of available address space allocated:              100.0
    Percentage of address space in use by end-sites:               99.6
Total number of prefixes smaller than registry allocations:        2041

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

Prefixes being announced by APNIC Region ASes:                     4253
    Total APNIC prefixes after maximum aggregation:                2168
    APNIC Deaggregation factor:                                    1.96
Prefixes being announced from the APNIC address blocks:            4252
    Unique aggregates announced from the APNIC address blocks:     2439
APNIC Region origin ASes present in the Internet Routing Table:     494
    APNIC Prefixes per ASN:                                        8.61
APNIC Region origin ASes announcing only one prefix:                215
APNIC Region transit ASes present in the Internet Routing Table:     49
Average APNIC Region AS path length visible:                        3.8
    Max APNIC Region AS path length visible:                         14
Number of APNIC region 32-bit ASNs visible in the Routing Table:    188
Number of APNIC addresses announced to Internet:               35570432
    Equivalent to 2 /8s, 30 /16s and 195 /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, 131072-153913
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:                      8235
    Total ARIN prefixes after maximum aggregation:                 4920
    ARIN Deaggregation factor:                                     1.67
Prefixes being announced from the ARIN address blocks:             8252
    Unique aggregates announced from the ARIN address blocks:      5492
ARIN Region origin ASes present in the Internet Routing Table:     1306
    ARIN Prefixes per ASN:                                         6.32
ARIN Region origin ASes announcing only one prefix:                 476
ARIN Region transit ASes present in the Internet Routing Table:     162
Average ARIN Region AS path length visible:                         3.6
    Max ARIN Region AS path length visible:                          14
Number of ARIN region 32-bit ASNs visible in the Routing Table:     213
Number of ARIN addresses announced to Internet:                80727552
    Equivalent to 4 /8s, 207 /16s and 206 /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:                      3508
    Total RIPE prefixes after maximum aggregation:                 2820
    RIPE Deaggregation factor:                                     1.24
Prefixes being announced from the RIPE address blocks:             3497
    Unique aggregates announced from the RIPE address blocks:      2854
RIPE Region origin ASes present in the Internet Routing Table:      673
    RIPE Prefixes per ASN:                                         5.20
RIPE Region origin ASes announcing only one prefix:                 297
RIPE Region transit ASes present in the Internet Routing Table:      98
Average RIPE Region AS path length visible:                         3.7
    Max RIPE Region AS path length visible:                          13
Number of RIPE region 32-bit ASNs visible in the Routing Table:     145
Number of RIPE addresses announced to Internet:                54340864
    Equivalent to 3 /8s, 61 /16s and 45 /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
                       196608-216475
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:                    1386
    Total LACNIC prefixes after maximum aggregation:                536
    LACNIC Deaggregation factor:                                   2.59
Prefixes being announced from the LACNIC address blocks:           1382
    Unique aggregates announced from the LACNIC address blocks:     714
LACNIC Region origin ASes present in the Internet Routing Table:    156
    LACNIC Prefixes per ASN:                                       8.86
LACNIC Region origin ASes announcing only one prefix:                57
LACNIC Region transit ASes present in the Internet Routing Table:    25
Average LACNIC Region AS path length visible:                       4.4
    Max LACNIC Region AS path length visible:                        13
Number of LACNIC region 32-bit ASNs visible in the Routing Table:    66
Number of LACNIC addresses announced to Internet:               3976448
    Equivalent to 0 /8s, 60 /16s and 173 /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:                   1055
    Total AfriNIC prefixes after maximum aggregation:               171
    AfriNIC Deaggregation factor:                                  6.17
Prefixes being announced from the AfriNIC address blocks:          1055
    Unique aggregates announced from the AfriNIC address blocks:    222
AfriNIC Region origin ASes present in the Internet Routing Table:    50
    AfriNIC Prefixes per ASN:                                     21.10
AfriNIC Region origin ASes announcing only one prefix:               26
AfriNIC Region transit ASes present in the Internet Routing Table:    9
Average AfriNIC Region AS path length visible:                      3.3
    Max AfriNIC Region AS path length visible:                        9
Number of AfriNIC region 32-bit ASNs visible in the Routing Table:   26
Number of AfriNIC addresses announced to Internet:              2661888
    Equivalent to 0 /8s, 40 /16s and 158 /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
  2907         593       2162     465  SINET-AS Research Organization of Infor
  7497         437        180      23  CSTNET-AS-AP Computer Network Informati
  1237         188         74     139  KREONET-AS-KR KISTI, KR
  7575         177        329     120  AARNET-AS-AP Australian Academic and Re
 58647         177         18       2  KAGAWAU-AS Kagawa University, JP
 55824         127         19      17  NKN-CORE-NW NKN Core Network, IN
  4538         111       2368      68  ERX-CERNET-BKB China Education and Rese
  4621          69         37      10  UNINET-AS-AP UNINET-, TH
  9411          66         16       2  NONTRINET-AS-AP Kasetsart University, T
  4762          64          4       1  MAHIDOL-BORDER-AS Mahidol University, T

Complete listing at https://bgp.nsrc.org/REN/ESnet/data-ASnet-APNIC

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

   ASN  No of nets  /20 equiv  MaxAgg  Description
   668         204        652     173  DNIC-AS-00668, US
   376         202        178     151  RISQ-AS, CA
  5786         197         16       1  UPRENET, PR
  2152         142        507      92  CSUNET-NW, US
 18558         141         18       4  NETBLK-RCOEK, US
    81         126        473      31  NCREN, US
   270         115        329      79  AS270, US
 23024         113          7      17  OCDE, US
  2920         101         34       7  LACOE, US
  6325          88        186      15  ILLINOIS-CENTURY, US

Complete listing at https://bgp.nsrc.org/REN/ESnet/data-ASnet-ARIN

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

   ASN  No of nets  /20 equiv  MaxAgg  Description
   680         283       1903     249  DFN Verein zur Foerderung eines Deutsch
   786         185       1767     182  JANET Jisc Services Limited, GB
  8895         133         24       4  ISU Internet Services Unit ISU, SA
   559         113        533     105  SWITCH Peering requests: peering at switch
  2614          94         27      74  ROEDUNET, RO
  1103          93       1246      82  SURFNET-NL SURFnet, The Netherlands, NL
   137          82        677      77  ASGARR Consortium GARR, IT
   553          76        462      76  BELWUE BelWue-Koordination, DE
  1930          65         81      60  RCCN Fundacao para a Ciencia e a Tecnol
  2200          64        599      59  FR-RENATER Reseau National de telecommu

Complete listing at https://bgp.nsrc.org/REN/ESnet/data-ASnet-RIPE

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

   ASN  No of nets  /20 equiv  MaxAgg  Description
  1916         208        176      42  Rede Nacional de Ensino e Pesquisa, BR
 28391         153         10      67  Universidad Juarez Autonoma de Tabasco,
 11340         104         24      48  Red Universitaria Nacional, CL
271640          70          8       1  UNIVERSIDADE FEDERAL DE VICOSA, BR
  4270          48         16       1  Red de Interconexion Universitaria, AR
 19611          48         17       2  Associacao Antonio Vieira - Unisinos, B
 61468          43          3      14  CEDIA, EC
  2715          42         99      32  Fundacao Carlos Chagas Filho de Amparo 
 28614          38          2       2  Fundacao Universidade Regional de Blume
  3596          34          4       3  Universidad Autonoma Metropolitana, MX

Complete listing at https://bgp.nsrc.org/REN/ESnet/data-ASnet-LACNIC

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

   ASN  No of nets  /20 equiv  MaxAgg  Description
  2018         374        319      71  TENET-1, ZA
 36914         253         82       3  KENET-AS, KE
327687         162         28       3  RENU, UG
  8094          48         48      15  PUKNET, ZA
327700          42         16       1  MoRENet, MZ
  3208          32          2       1  ARN, DZ
  6879          24          2       9  ENSTINET-, EG
 37074          14          8       2  UG-AS, GH
 37501          11         49       6  UOFS, ZA
 37654          10          1       6  RwEdNet-AS, RW

Complete listing at https://bgp.nsrc.org/REN/ESnet/data-ASnet-AFRINIC

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

   ASN  No of nets  /20 equiv  MaxAgg  Description
  2907         593       2162     465  SINET-AS Research Organization of Infor
  7497         437        180      23  CSTNET-AS-AP Computer Network Informati
  2018         374        319      71  TENET-1, ZA
   680         283       1903     249  DFN Verein zur Foerderung eines Deutsch
 36914         253         82       3  KENET-AS, KE
  1916         208        176      42  Rede Nacional de Ensino e Pesquisa, BR
   668         204        652     173  DNIC-AS-00668, US
   376         202        178     151  RISQ-AS, CA
  5786         197         16       1  UPRENET, PR
  1237         188         74     139  KREONET-AS-KR KISTI, KR

Complete listing at https://bgp.nsrc.org/REN/ESnet/data-ASnet

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

   ASN  No of nets  Net Savings  Description
  7497         437          414  CSTNET-AS-AP Computer Network Information Cente
  2018         374          303  TENET-1, ZA
 36914         253          250  KENET-AS, KE
  5786         197          196  UPRENET, PR
 58647         177          175  KAGAWAU-AS Kagawa University, JP
  1916         208          166  Rede Nacional de Ensino e Pesquisa, BR
327687         162          159  RENU, UG
 18558         141          137  NETBLK-RCOEK, US
  8895         133          129  ISU Internet Services Unit ISU, SA
 55824         127          110  NKN-CORE-NW NKN Core Network, IN

Complete listing at https://bgp.nsrc.org/REN/ESnet/data-CIDRnet

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

    Bad AS  Designation  Net Originated      Transit AS  Transit AS Name
    394607  UNALLOCATED  104.249.65.0/24          23024  OCDE, US
     22272  UNALLOCATED  206.208.24.0/21           6325  ILLINOIS-CENTURY, US
    394607  UNALLOCATED  216.100.93.0/24          23024  OCDE, US

Complete listing at https://bgp.nsrc.org/REN/ESnet/data-badAS

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

Unassigned Network     ASN Information  AS Name
134.208.0.0/16       Origin:     17711  NDHU-TW National Dong Hwa University, TW
134.208.0.0/16      Transit:      7539  TWAREN-TW National Center for High-perfo
202.58.231.0/24      Origin:    134096  EHEALTHNSW-AS-AP eHealth NSW, AU
202.58.231.0/24     Transit:      7575  AARNET-AS-AP Australian Academic and Res

Complete listing at https://bgp.nsrc.org/REN/ESnet/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        /8:0        /9:0       /10:0       /11:0       /12:0       
/13:0       /14:35      /15:122     /16:2030    /17:433     /18:445     
/19:587     /20:843     /21:857     /22:1478    /23:1531    /24:10079   
/25:0       /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
 36914         242         253  KENET-AS, KE
  8895         128         133  ISU Internet Services Unit ISU, SA
 23024          52         113  OCDE, US
 32440          38          61  LONI, US
327700          38          42  MoRENet, MZ
 28614          32          38  Fundacao Universidade Regional de Blumenau, BR
 46115          32          35  LUTHER, US
 25977          30          44  HCCS, US
200521          30          52  SEAP-AGE, ES
 27609          29          45  USC-UNIVERSITY-HOSPITAL, US

Complete listing at https://bgp.nsrc.org/REN/ESnet/data-sXXas-nos

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

   1:2         5:15        6:4         8:5        12:2        14:89     
  18:43       23:8        24:3        31:7        35:3        38:10     
  40:1        41:120      42:10       44:6        45:41       46:5      
  47:1        49:7        50:8        52:1        58:1        59:3      
  60:5        61:3        62:10       63:37       64:51       65:15     
  66:55       67:45       68:20       69:17       70:2        71:1      
  72:7        74:52       76:42       77:9        78:3        79:10     
  80:12       81:27       82:7        83:6        84:8        85:41     
  86:1        87:1        89:10       91:43       92:2        93:4      
  94:4        95:2        97:3        98:2       101:2       102:29     
 103:213     104:77      108:8       109:6       114:23      116:5      
 117:61      119:18      121:12      123:8       124:40      125:4      
 128:56      129:51      130:88      131:65      132:59      133:152    
 134:108     136:196     137:128     138:9       139:5       140:41     
 141:3       142:34      143:22      144:28      145:2       146:131    
 147:58      148:193     149:12      150:41      151:13      152:131    
 153:13      154:29      155:63      156:65      157:18      158:34     
 159:115     160:34      161:18      162:30      163:70      164:13     
 165:47      166:2       167:13      168:115     169:8       170:79     
 171:1       172:3       173:7       174:1       175:17      177:6      
 179:11      180:15      181:1       182:1       184:2       185:48     
 186:3       187:18      188:13      189:3       190:19      191:13     
 192:1487    193:289     194:129     195:76      196:201     197:167    
 198:513     199:286     200:314     201:36      202:571     203:410    
 204:368     205:131     206:196     207:160     208:76      209:120    
 210:180     211:13      212:159     213:5       214:8       216:94     
 217:9       218:22      219:5       220:16      222:2       223:4      


End of report


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