[REN-BGP-stats-all] IPv4 R&E Routing Table Report - ASREN (R&E) view
REN Routing Table Report
cscora at bgp.nsrc.org
Thu May 15 17:05:40 UTC 2025
IPv4 R&E Routing Table Report 17:05 GMT Thu 15 May, 2025
IPv4 BGP Table (R&E) as seen at ASREN.
Report Website: https://bgp.nsrc.org/REN
Detailed Analysis: https://bgp.nsrc.org/REN/ASREN/
Analysis Summary
----------------
BGP routing table entries examined: 13549
Prefixes after maximum aggregation (per Origin AS): 8065
Deaggregation factor: 1.68
Unique aggregates announced (without unneeded subnets): 8849
Number of IPv4 prefixes with a valid ROA: 5725
Number of IPv4 prefixes with an invalid ROA: 1
Number of IPv4 prefixes with no ROA: 7823
Total ASes present in the Internet Routing Table: 2053
Prefixes per ASN: 6.60
Origin-only ASes present in the Internet Routing Table: 1780
Origin ASes announcing only one prefix: 828
Transit ASes present in the Internet Routing Table: 273
Transit-only ASes present in the Internet Routing Table: 46
Paths with bogon ASNs present in the IPv4 Routing Table: 0
Average AS path length visible in the Internet Routing Table: 4.5
Max AS path length visible: 13
Max AS path prepend of ASN ( 43066) 9
Prefixes from unregistered ASNs in the Routing Table: 32
Number of instances of unregistered ASNs: 32
Number of 32-bit ASNs allocated by the RIRs: 46405
Number of 32-bit ASNs visible in the Routing Table: 507
Prefixes from 32-bit ASNs in the Routing Table: 1324
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: 161899008
Equivalent to 9 /8s, 166 /16s and 98 /24s
Percentage of available address space announced: 4.4
Percentage of allocated address space announced: 4.4
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: 1638
APNIC Region Analysis Summary
-----------------------------
Prefixes being announced by APNIC Region ASes: 3254
Total APNIC prefixes after maximum aggregation: 1666
APNIC Deaggregation factor: 1.95
Prefixes being announced from the APNIC address blocks: 3253
Unique aggregates announced from the APNIC address blocks: 1805
APNIC Region origin ASes present in the Internet Routing Table: 434
APNIC Prefixes per ASN: 7.50
APNIC Region origin ASes announcing only one prefix: 206
APNIC Region transit ASes present in the Internet Routing Table: 40
Average APNIC Region AS path length visible: 4.0
Max APNIC Region AS path length visible: 13
Number of APNIC region 32-bit ASNs visible in the Routing Table: 194
Number of APNIC addresses announced to Internet: 37291584
Equivalent to 2 /8s, 57 /16s and 6 /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, 131072-155961
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: 5786
Total ARIN prefixes after maximum aggregation: 3402
ARIN Deaggregation factor: 1.70
Prefixes being announced from the ARIN address blocks: 5837
Unique aggregates announced from the ARIN address blocks: 3813
ARIN Region origin ASes present in the Internet Routing Table: 907
ARIN Prefixes per ASN: 6.44
ARIN Region origin ASes announcing only one prefix: 327
ARIN Region transit ASes present in the Internet Routing Table: 115
Average ARIN Region AS path length visible: 5.0
Max ARIN Region AS path length visible: 10
Number of ARIN region 32-bit ASNs visible in the Routing Table: 135
Number of ARIN addresses announced to Internet: 65782944
Equivalent to 3 /8s, 235 /16s and 196 /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, 393216-402332
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, 45/8, 47/8, 48/8, 50/8, 52/8,
54/8, 55/8, 56/8, 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: 3143
Total RIPE prefixes after maximum aggregation: 2592
RIPE Deaggregation factor: 1.21
Prefixes being announced from the RIPE address blocks: 3128
Unique aggregates announced from the RIPE address blocks: 2648
RIPE Region origin ASes present in the Internet Routing Table: 565
RIPE Prefixes per ASN: 5.54
RIPE Region origin ASes announcing only one prefix: 251
RIPE Region transit ASes present in the Internet Routing Table: 89
Average RIPE Region AS path length visible: 3.8
Max RIPE Region AS path length visible: 13
Number of RIPE region 32-bit ASNs visible in the Routing Table: 134
Number of RIPE addresses announced to Internet: 56275072
Equivalent to 3 /8s, 90 /16s and 176 /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,
53/8, 57/8, 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: 708
Total LACNIC prefixes after maximum aggregation: 345
LACNIC Deaggregation factor: 2.05
Prefixes being announced from the LACNIC address blocks: 704
Unique aggregates announced from the LACNIC address blocks: 498
LACNIC Region origin ASes present in the Internet Routing Table: 69
LACNIC Prefixes per ASN: 10.20
LACNIC Region origin ASes announcing only one prefix: 28
LACNIC Region transit ASes present in the Internet Routing Table: 16
Average LACNIC Region AS path length visible: 4.6
Max LACNIC Region AS path length visible: 8
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 27
Number of LACNIC addresses announced to Internet: 1851552
Equivalent to 0 /8s, 28 /16s and 64 /24s
LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247,
61440-61951, 64099-64197, 262144-274844 + 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: 626
Total AfriNIC prefixes after maximum aggregation: 56
AfriNIC Deaggregation factor: 11.18
Prefixes being announced from the AfriNIC address blocks: 625
Unique aggregates announced from the AfriNIC address blocks: 83
AfriNIC Region origin ASes present in the Internet Routing Table: 31
AfriNIC Prefixes per ASN: 20.16
AfriNIC Region origin ASes announcing only one prefix: 16
AfriNIC Region transit ASes present in the Internet Routing Table: 7
Average AfriNIC Region AS path length visible: 5.7
Max AfriNIC Region AS path length visible: 9
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 17
Number of AfriNIC addresses announced to Internet: 695552
Equivalent to 0 /8s, 10 /16s and 157 /24s
AfriNIC AS Blocks 36864-37887, 327680-329727 & ERX transfers
AfriNIC Address Blocks 41/8, 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 597 2170 464 SINET-AS Research Organization of Informa
7497 454 180 24 CSTNET-AS-AP Computer Network Information
4538 190 4192 71 ERX-CERNET-BKB China Education and Resear
58647 182 18 2 KAGAWAU-AS Kagawa University, JP
7575 173 281 117 AARNET-AS-AP Australian Academic and Rese
55824 147 19 21 NKN-CORE-NW NKN Core Network, IN
2697 58 4 34 ERX-ERNET-AS Education and Research Netwo
45773 48 3 5 HECPERN-AS-PK PERN AS Content Servie Prov
132524 42 9 10 TIFR-AS Tata Institute of Fundamental Res
9317 40 16 1 ITISNET-AS INHA UNIVERSITY, KR
Complete listing at https://bgp.nsrc.org/REN/ASREN/data-ASnet-APNIC
ARIN Region per AS prefix count summary
---------------------------------------
ASN No of nets /20 equiv MaxAgg Description
5786 199 16 1 UPRENET, PR
376 198 162 147 RISQ-AS, CA
2920 169 34 7 LACOE, US
2152 147 507 97 CENIC-2152, US
18558 139 18 4 NETBLK-RCOEK, US
81 99 361 26 NCREN, US
23024 99 7 17 OCDE, US
21976 88 34 14 NJEDGE-NET, US
1736 79 16 1 MU-AS, US
22742 67 37 32 CT-EDU-NET, US
Complete listing at https://bgp.nsrc.org/REN/ASREN/data-ASnet-ARIN
RIPE Region per AS prefix count summary
---------------------------------------
ASN No of nets /20 equiv MaxAgg Description
680 284 1899 250 DFN Verein zur Foerderung eines Deutschen
786 194 1742 187 JANET Jisc Services Limited, GB
559 114 533 104 SWITCH Peering requests: peering at switch.c
1103 95 1471 82 SURFNET-NL SURFnet, The Netherlands, NL
2614 89 26 69 ROEDUNET, RO
137 82 677 77 ASGARR Consortium GARR, IT
1930 79 88 74 RCCN Fundacao para a Ciencia e a Tecnolog
553 75 366 75 BELWUE BelWue-Koordination, DE
2200 63 614 58 FR-RENATER Reseau National de telecommuni
200521 57 4 23 SEAP-AGE, ES
Complete listing at https://bgp.nsrc.org/REN/ASREN/data-ASnet-RIPE
LACNIC Region per AS prefix count summary
-----------------------------------------
ASN No of nets /20 equiv MaxAgg Description
1916 268 59 116 Rede Nacional de Ensino e Pesquisa, BR
11340 110 25 52 Red Universitaria Nacional, CL
271640 68 8 1 UNIVERSIDADE FEDERAL DE VICOSA, BR
2715 43 83 32 Fundacao Carlos Chagas Filho de Amparo a
20191 26 16 1 Pontificia Universidad Catolica de Chile,
28571 18 40 18 UNIVERSIDADE DE SAO PAULO, BR
52888 10 7 7 UNIVERSIDADE FEDERAL DE SAO CARLOS, BR
61468 10 1 9 CEDIA, EC
278 9 8 7 Universidad Nacional Autonoma de Mexico,
10715 9 18 3 Universidade Federal de Santa Catarina, B
Complete listing at https://bgp.nsrc.org/REN/ASREN/data-ASnet-LACNIC
AfriNIC Region per AS prefix count summary
------------------------------------------
ASN No of nets /20 equiv MaxAgg Description
36914 489 82 3 KENET-AS, KE
37215 36 8 1 MAREN, MW
6879 24 2 9 ENSTINET-, EG
30983 12 4 2 MARWAN-AS, MA
327700 11 16 1 MoRENet, MZ
37654 10 1 6 RwEdNet-AS, RW
37661 9 6 3 NRaE1-AS, NG
327798 4 0 3 BERNET, BI
327947 3 1 3 KNUST-, GH
37182 2 8 1 TERNET, TZ
Complete listing at https://bgp.nsrc.org/REN/ASREN/data-ASnet-AFRINIC
Global Per AS prefix count summary
----------------------------------
ASN No of nets /20 equiv MaxAgg Description
2907 597 2170 464 SINET-AS Research Organization of Informa
36914 489 82 3 KENET-AS, KE
7497 454 180 24 CSTNET-AS-AP Computer Network Information
680 284 1899 250 DFN Verein zur Foerderung eines Deutschen
1916 268 59 116 Rede Nacional de Ensino e Pesquisa, BR
5786 199 16 1 UPRENET, PR
376 198 162 147 RISQ-AS, CA
786 194 1742 187 JANET Jisc Services Limited, GB
4538 190 4192 71 ERX-CERNET-BKB China Education and Resear
58647 182 18 2 KAGAWAU-AS Kagawa University, JP
Complete listing at https://bgp.nsrc.org/REN/ASREN/data-ASnet
Global Per AS Maximum Aggregation summary
-----------------------------------------
ASN No of nets Net Savings Description
36914 489 486 KENET-AS, KE
7497 454 430 CSTNET-AS-AP Computer Network Information Cente
5786 199 198 UPRENET, PR
58647 182 180 KAGAWAU-AS Kagawa University, JP
2920 169 162 LACOE, US
1916 268 152 Rede Nacional de Ensino e Pesquisa, BR
18558 139 135 NETBLK-RCOEK, US
55824 147 126 NKN-CORE-NW NKN Core Network, IN
4538 190 119 ERX-CERNET-BKB China Education and Research Net
23024 99 82 OCDE, US
Complete listing at https://bgp.nsrc.org/REN/ASREN/data-CIDRnet
List of Unregistered Origin ASNs (Global)
-----------------------------------------
Bad AS Designation Net Originated Transit AS Transit AS Name
26898 UNALLOCATED 131.187.248.0/22 3112 OARNET-AS-1, US
26898 UNALLOCATED 131.187.248.0/24 3112 OARNET-AS-1, US
26898 UNALLOCATED 131.187.249.0/24 3112 OARNET-AS-1, US
26898 UNALLOCATED 131.187.250.0/24 3112 OARNET-AS-1, US
26898 UNALLOCATED 131.187.251.0/24 3112 OARNET-AS-1, US
26898 UNALLOCATED 198.30.187.0/24 3112 OARNET-AS-1, US
26898 UNALLOCATED 208.108.80.0/20 3112 OARNET-AS-1, US
26898 UNALLOCATED 208.108.80.0/24 3112 OARNET-AS-1, US
26898 UNALLOCATED 208.108.81.0/24 3112 OARNET-AS-1, US
26898 UNALLOCATED 208.108.82.0/24 3112 OARNET-AS-1, US
Complete listing at https://bgp.nsrc.org/REN/ASREN/data-badAS
Advertised Unallocated Addresses
--------------------------------
Unassigned Network ASN Information AS Name
164.160.192.0/21 Origin: 37661 NRaE1-AS, NG
164.160.192.0/21 Transit: 37288 WACREN, SN
203.9.156.0/24 Origin: 1851 ADELAIDE-UNIVERSITY-AS-AP The University
203.9.156.0/24 Transit: 7575 AARNET-AS-AP Australian Academic and Res
Complete listing at https://bgp.nsrc.org/REN/ASREN/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 /9:1 /10:1 /11:0 /12:9
/13:16 /14:30 /15:99 /16:1611 /17:295 /18:308
/19:446 /20:549 /21:590 /22:1014 /23:1084 /24:7337
/25:51 /26:77 /27:31 /28:0 /29:0 /30:0
/31:0 /32:0
Advertised prefixes smaller than registry allocations
-----------------------------------------------------
ASN No of nets Total ann. Description
36914 465 489 KENET-AS, KE
1916 85 268 Rede Nacional de Ensino e Pesquisa, BR
23024 38 99 OCDE, US
200521 32 57 SEAP-AGE, ES
37215 30 36 MAREN, MW
32440 29 53 LONI, US
25977 27 30 HCCS, US
26898 24 64 RESERVED, ZZ
36794 24 26 META SOLUTIONS PIKETON, US
60187 23 48 LGFL-AS, GB
Complete listing at https://bgp.nsrc.org/REN/ASREN/data-sXXas-nos
Number of /24s announced per /8 block (Global)
----------------------------------------------
1:1 5:16 8:2 12:1 14:93 23:3
24:2 31:1 37:9 38:4 40:1 41:167
42:13 44:4 45:24 46:4 47:1 49:6
58:16 59:1 60:6 61:2 62:5 63:3
64:30 66:21 67:31 68:1 69:8 70:2
72:7 74:17 76:29 77:6 78:3 79:9
80:8 81:23 82:2 83:7 84:6 85:31
87:1 89:10 91:35 93:14 94:2 95:2
96:5 98:2 101:2 102:3 103:263 104:76
108:4 109:1 111:17 114:2 116:6 118:2
119:23 121:28 123:8 124:42 128:33 129:34
130:94 131:53 132:53 133:156 134:75 136:198
137:47 138:10 139:10 140:26 141:2 142:25
143:16 144:25 145:2 146:121 147:15 148:9
149:12 150:6 151:5 152:111 153:13 154:22
155:45 156:128 157:11 158:27 159:116 160:34
161:9 162:17 163:61 164:12 165:32 167:10
168:12 169:5 170:13 172:2 173:5 177:1
179:9 180:16 182:1 184:6 185:36 186:2
187:7 188:13 190:1 191:2 192:1145 193:252
194:85 195:67 196:11 197:330 198:332 199:197
200:252 201:2 202:356 203:177 204:314 205:98
206:162 207:196 208:48 209:92 210:104 211:2
212:42 213:4 216:52 217:22 219:7 222:3
223:5
End of report
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