[REN-BGP-stats-all] IPv4 R&E Routing Table Report - ASREN (R&E) view
REN Routing Table Report
cscora at bgp.nsrc.org
Thu Mar 27 17:05:46 UTC 2025
IPv4 R&E Routing Table Report 17:05 GMT Thu 27 Mar, 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: 13869
Prefixes after maximum aggregation (per Origin AS): 8123
Deaggregation factor: 1.71
Unique aggregates announced (without unneeded subnets): 8985
Number of IPv4 prefixes with a valid ROA: 5729
Number of IPv4 prefixes with an invalid ROA: 1
Number of IPv4 prefixes with no ROA: 8139
Total ASes present in the Internet Routing Table: 2080
Prefixes per ASN: 6.67
Origin-only ASes present in the Internet Routing Table: 1808
Origin ASes announcing only one prefix: 846
Transit ASes present in the Internet Routing Table: 272
Transit-only ASes present in the Internet Routing Table: 42
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: 0
Number of instances of unregistered ASNs: 0
Number of 32-bit ASNs allocated by the RIRs: 46099
Number of 32-bit ASNs visible in the Routing Table: 508
Prefixes from 32-bit ASNs in the Routing Table: 1365
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: 165121472
Equivalent to 9 /8s, 215 /16s and 141 /24s
Percentage of available address space announced: 4.5
Percentage of allocated address space announced: 4.5
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: 1632
APNIC Region Analysis Summary
-----------------------------
Prefixes being announced by APNIC Region ASes: 3395
Total APNIC prefixes after maximum aggregation: 1697
APNIC Deaggregation factor: 2.00
Prefixes being announced from the APNIC address blocks: 3395
Unique aggregates announced from the APNIC address blocks: 1842
APNIC Region origin ASes present in the Internet Routing Table: 446
APNIC Prefixes per ASN: 7.61
APNIC Region origin ASes announcing only one prefix: 208
APNIC Region transit ASes present in the Internet Routing Table: 39
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: 199
Number of APNIC addresses announced to Internet: 37281856
Equivalent to 2 /8s, 56 /16s and 224 /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: 6079
Total ARIN prefixes after maximum aggregation: 3460
ARIN Deaggregation factor: 1.76
Prefixes being announced from the ARIN address blocks: 6093
Unique aggregates announced from the ARIN address blocks: 3883
ARIN Region origin ASes present in the Internet Routing Table: 938
ARIN Prefixes per ASN: 6.50
ARIN Region origin ASes announcing only one prefix: 341
ARIN Region transit ASes present in the Internet Routing Table: 114
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: 140
Number of ARIN addresses announced to Internet: 69281248
Equivalent to 4 /8s, 33 /16s and 37 /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: 3133
Total RIPE prefixes after maximum aggregation: 2580
RIPE Deaggregation factor: 1.21
Prefixes being announced from the RIPE address blocks: 3122
Unique aggregates announced from the RIPE address blocks: 2640
RIPE Region origin ASes present in the Internet Routing Table: 562
RIPE Prefixes per ASN: 5.56
RIPE Region origin ASes announcing only one prefix: 252
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: 12
Number of RIPE region 32-bit ASNs visible in the Routing Table: 131
Number of RIPE addresses announced to Internet: 56360448
Equivalent to 3 /8s, 91 /16s and 254 /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: 634
Total LACNIC prefixes after maximum aggregation: 332
LACNIC Deaggregation factor: 1.91
Prefixes being announced from the LACNIC address blocks: 630
Unique aggregates announced from the LACNIC address blocks: 539
LACNIC Region origin ASes present in the Internet Routing Table: 63
LACNIC Prefixes per ASN: 10.00
LACNIC Region origin ASes announcing only one prefix: 27
LACNIC Region transit ASes present in the Internet Routing Table: 14
Average LACNIC Region AS path length visible: 4.7
Max LACNIC Region AS path length visible: 10
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 22
Number of LACNIC addresses announced to Internet: 1614240
Equivalent to 0 /8s, 24 /16s and 161 /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: 628
Total AfriNIC prefixes after maximum aggregation: 54
AfriNIC Deaggregation factor: 11.63
Prefixes being announced from the AfriNIC address blocks: 627
Unique aggregates announced from the AfriNIC address blocks: 79
AfriNIC Region origin ASes present in the Internet Routing Table: 29
AfriNIC Prefixes per ASN: 21.62
AfriNIC Region origin ASes announcing only one prefix: 18
AfriNIC Region transit ASes present in the Internet Routing Table: 7
Average AfriNIC Region AS path length visible: 5.4
Max AfriNIC Region AS path length visible: 9
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 16
Number of AfriNIC addresses announced to Internet: 581376
Equivalent to 0 /8s, 8 /16s and 223 /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 635 2170 465 SINET-AS Research Organization of Informa
7497 452 180 24 CSTNET-AS-AP Computer Network Information
4538 190 4192 72 ERX-CERNET-BKB China Education and Resear
58647 183 18 2 KAGAWAU-AS Kagawa University, JP
7575 174 297 117 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
38280 50 3 2 MONASHUNI-MY-AS-AP Monash University Sunw
45773 48 3 5 HECPERN-AS-PK PERN AS Content Servie Prov
132524 43 9 11 TIFR-AS Tata Institute of Fundamental Res
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
376 184 160 139 RISQ-AS, CA
2920 173 34 7 LACOE, US
2152 149 507 97 CENIC-2152, US
18558 139 18 4 NETBLK-RCOEK, US
81 112 423 30 NCREN, US
23024 99 7 17 OCDE, US
21976 88 34 14 NJEDGE-NET, US
237 84 541 50 MERIT-AS-14, US
1736 79 16 1 MU-AS, 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 249 DFN Verein zur Foerderung eines Deutschen
786 196 1750 188 JANET Jisc Services Limited, GB
559 114 533 104 SWITCH Peering requests: peering at switch.c
1103 96 1487 83 SURFNET-NL SURFnet, The Netherlands, NL
2614 90 26 70 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 64 630 59 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 231 51 114 Rede Nacional de Ensino e Pesquisa, BR
11340 110 25 52 Red Universitaria Nacional, CL
271640 66 4 29 UNIVERSIDADE FEDERAL DE VICOSA, BR
1251 36 31 27 FUNDACAO DE AMPARO A PESQUISA DO ESTADO S
20191 28 16 1 Pontificia Universidad Catolica de Chile,
28571 18 40 18 UNIVERSIDADE DE SAO PAULO, BR
278 11 16 4 Universidad Nacional Autonoma de Mexico,
21612 11 1 8 FUNDACAO INSTITUTO OSWALDO CRUZ, BR
61468 11 1 5 CEDIA, EC
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 495 82 3 KENET-AS, KE
37215 34 8 1 MAREN, MW
6879 24 2 9 ENSTINET-, EG
37661 13 8 5 NRaE1-AS, NG
30983 12 4 2 MARWAN-AS, MA
327700 11 16 1 MoRENet, MZ
37654 10 1 6 RwEdNet-AS, RW
327798 4 0 3 BERNET, BI
327947 3 1 3 KNUST-, GH
327992 2 1 2 GHANAIAN-ACADEMIC-AND-RESEARCH-NETWORK, G
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 635 2170 465 SINET-AS Research Organization of Informa
36914 495 82 3 KENET-AS, KE
7497 452 180 24 CSTNET-AS-AP Computer Network Information
680 284 1899 249 DFN Verein zur Foerderung eines Deutschen
1916 231 51 114 Rede Nacional de Ensino e Pesquisa, BR
5786 199 16 1 UPRENET, PR
786 196 1750 188 JANET Jisc Services Limited, GB
4538 190 4192 72 ERX-CERNET-BKB China Education and Resear
376 184 160 139 RISQ-AS, CA
58647 183 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 495 492 KENET-AS, KE
7497 452 428 CSTNET-AS-AP Computer Network Information Cente
5786 199 198 UPRENET, PR
58647 183 181 KAGAWAU-AS Kagawa University, JP
2920 173 166 LACOE, US
18558 139 135 NETBLK-RCOEK, US
55824 147 126 NKN-CORE-NW NKN Core Network, IN
4538 190 118 ERX-CERNET-BKB China Education and Research Net
1916 231 117 Rede Nacional de Ensino e Pesquisa, BR
81 112 82 NCREN, US
Complete listing at https://bgp.nsrc.org/REN/ASREN/data-CIDRnet
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
/13:17 /14:33 /15:100 /16:1633 /17:307 /18:314
/19:440 /20:575 /21:605 /22:1029 /23:1147 /24:7507
/25:50 /26:70 /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 472 495 KENET-AS, KE
1916 73 231 Rede Nacional de Ensino e Pesquisa, BR
23024 38 99 OCDE, US
200521 32 57 SEAP-AGE, ES
32440 30 51 LONI, US
37215 28 34 MAREN, MW
25977 27 30 HCCS, US
26898 24 32 LNOCA-ORG, US
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 5:15 8:2 12:1 14:93 23:5
24:2 31:1 35:3 37:8 38:3 41:206
42:13 44:3 45:22 46:4 47:1 49:8
50:2 58:15 59:17 60:6 61:2 62:5
63:3 64:34 66:18 67:31 68:2 69:10
70:2 71:1 72:7 74:19 76:30 77:6
78:3 79:9 80:8 81:24 82:2 83:7
84:6 85:31 87:1 89:9 91:35 93:14
94:2 95:1 96:5 98:2 101:2 102:3
103:292 104:75 108:6 109:1 111:17 114:1
116:6 118:33 119:30 121:28 122:8 123:8
124:42 128:30 129:34 130:95 131:51 132:53
133:157 134:74 136:198 137:47 138:58 139:10
140:29 141:4 142:25 143:16 144:22 145:2
146:122 147:15 148:8 149:11 150:41 151:5
152:81 153:14 154:22 155:40 156:130 157:13
158:28 159:116 160:34 161:13 162:14 163:58
164:13 165:8 167:7 168:35 169:6 170:13
171:1 172:2 173:5 177:2 179:7 180:16
182:1 184:6 185:36 187:1 188:12 190:1
191:2 192:1157 193:251 194:84 195:66 196:10
197:298 198:358 199:203 200:234 201:2 202:365
203:185 204:312 205:102 206:158 207:197 208:50
209:80 210:106 211:2 212:41 213:4 216:52
217:21 219:6 222:3 223:4
End of report
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