[REN-BGP-stats-all] IPv4 R&E Routing Table Report - ASREN (R&E) view
REN Routing Table Report
cscora at bgp.nsrc.org
Sun May 4 17:05:44 UTC 2025
IPv4 R&E Routing Table Report 17:05 GMT Sun 04 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: 13686
Prefixes after maximum aggregation (per Origin AS): 8206
Deaggregation factor: 1.67
Unique aggregates announced (without unneeded subnets): 9016
Number of IPv4 prefixes with a valid ROA: 5701
Number of IPv4 prefixes with an invalid ROA: 1
Number of IPv4 prefixes with no ROA: 7984
Total ASes present in the Internet Routing Table: 2090
Prefixes per ASN: 6.55
Origin-only ASes present in the Internet Routing Table: 1814
Origin ASes announcing only one prefix: 845
Transit ASes present in the Internet Routing Table: 276
Transit-only ASes present in the Internet Routing Table: 45
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: 33
Number of instances of unregistered ASNs: 33
Number of 32-bit ASNs allocated by the RIRs: 46334
Number of 32-bit ASNs visible in the Routing Table: 521
Prefixes from 32-bit ASNs in the Routing Table: 1373
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: 162544896
Equivalent to 9 /8s, 176 /16s and 61 /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: 1515
APNIC Region Analysis Summary
-----------------------------
Prefixes being announced by APNIC Region ASes: 3445
Total APNIC prefixes after maximum aggregation: 1721
APNIC Deaggregation factor: 2.00
Prefixes being announced from the APNIC address blocks: 3445
Unique aggregates announced from the APNIC address blocks: 1877
APNIC Region origin ASes present in the Internet Routing Table: 454
APNIC Prefixes per ASN: 7.59
APNIC Region origin ASes announcing only one prefix: 209
APNIC Region transit ASes present in the Internet Routing Table: 41
Average APNIC Region AS path length visible: 4.1
Max APNIC Region AS path length visible: 13
Number of APNIC region 32-bit ASNs visible in the Routing Table: 201
Number of APNIC addresses announced to Internet: 37339456
Equivalent to 2 /8s, 57 /16s and 193 /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: 5835
Total ARIN prefixes after maximum aggregation: 3431
ARIN Deaggregation factor: 1.70
Prefixes being announced from the ARIN address blocks: 5885
Unique aggregates announced from the ARIN address blocks: 3835
ARIN Region origin ASes present in the Internet Routing Table: 922
ARIN Prefixes per ASN: 6.38
ARIN Region origin ASes announcing only one prefix: 338
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: 143
Number of ARIN addresses announced to Internet: 66107040
Equivalent to 3 /8s, 240 /16s and 182 /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: 2601
RIPE Deaggregation factor: 1.21
Prefixes being announced from the RIPE address blocks: 3129
Unique aggregates announced from the RIPE address blocks: 2647
RIPE Region origin ASes present in the Internet Routing Table: 567
RIPE Prefixes per ASN: 5.52
RIPE Region origin ASes announcing only one prefix: 252
RIPE Region transit ASes present in the Internet Routing Table: 90
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: 135
Number of RIPE addresses announced to Internet: 56374656
Equivalent to 3 /8s, 92 /16s and 53 /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: 731
Total LACNIC prefixes after maximum aggregation: 396
LACNIC Deaggregation factor: 1.85
Prefixes being announced from the LACNIC address blocks: 727
Unique aggregates announced from the LACNIC address blocks: 576
LACNIC Region origin ASes present in the Internet Routing Table: 72
LACNIC Prefixes per ASN: 10.10
LACNIC Region origin ASes announcing only one prefix: 32
LACNIC Region transit ASes present in the Internet Routing Table: 16
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: 28
Number of LACNIC addresses announced to Internet: 2051232
Equivalent to 0 /8s, 31 /16s and 76 /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: 499
Total AfriNIC prefixes after maximum aggregation: 52
AfriNIC Deaggregation factor: 9.60
Prefixes being announced from the AfriNIC address blocks: 498
Unique aggregates announced from the AfriNIC address blocks: 79
AfriNIC Region origin ASes present in the Internet Routing Table: 28
AfriNIC Prefixes per ASN: 17.79
AfriNIC Region origin ASes announcing only one prefix: 14
AfriNIC Region transit ASes present in the Internet Routing Table: 6
Average AfriNIC Region AS path length visible: 5.8
Max AfriNIC Region AS path length visible: 9
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 14
Number of AfriNIC addresses announced to Internet: 670208
Equivalent to 0 /8s, 10 /16s and 58 /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 634 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 174 282 117 AARNET-AS-AP Australian Academic and Rese
55824 146 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 42 9 10 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
376 199 162 149 RISQ-AS, CA
5786 199 16 1 UPRENET, PR
2920 169 34 7 LACOE, US
2152 147 507 97 CENIC-2152, US
18558 139 18 4 NETBLK-RCOEK, US
81 100 361 27 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
786 195 1750 187 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 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 53 4 28 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 266 59 115 Rede Nacional de Ensino e Pesquisa, BR
11340 109 25 51 Red Universitaria Nacional, CL
271640 67 4 30 UNIVERSIDADE FEDERAL DE VICOSA, BR
2715 44 67 33 Fundacao Carlos Chagas Filho de Amparo a
1251 37 31 26 FUNDACAO DE AMPARO A PESQUISA DO ESTADO S
20191 28 16 1 Pontificia Universidad Catolica de Chile,
28571 12 37 12 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,
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 368 82 3 KENET-AS, KE
37215 34 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
37496 2 0 1 Aga-Khan-University, 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 634 2170 464 SINET-AS Research Organization of Informa
7497 454 180 24 CSTNET-AS-AP Computer Network Information
36914 368 82 3 KENET-AS, KE
680 284 1899 250 DFN Verein zur Foerderung eines Deutschen
1916 266 59 115 Rede Nacional de Ensino e Pesquisa, BR
376 199 162 149 RISQ-AS, CA
5786 199 16 1 UPRENET, PR
786 195 1750 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
7497 454 430 CSTNET-AS-AP Computer Network Information Cente
36914 368 365 KENET-AS, KE
5786 199 198 UPRENET, PR
58647 182 180 KAGAWAU-AS Kagawa University, JP
2920 169 162 LACOE, US
1916 266 151 Rede Nacional de Ensino e Pesquisa, BR
18558 139 135 NETBLK-RCOEK, US
55824 146 125 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
36288 UNALLOCATED 64.79.154.0/24 293 ESNET, US
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
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 /16:1615 /17:297 /18:311
/19:447 /20:575 /21:606 /22:1024 /23:1110 /24:7383
/25:50 /26:80 /27:32 /28:0 /29:0 /30:0
/31:0 /32:0
Advertised prefixes smaller than registry allocations
-----------------------------------------------------
ASN No of nets Total ann. Description
36914 348 368 KENET-AS, KE
1916 85 266 Rede Nacional de Ensino e Pesquisa, BR
23024 38 99 OCDE, US
32440 29 53 LONI, US
200521 29 53 SEAP-AGE, ES
37215 28 34 MAREN, MW
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 14:92 23:3
24:2 31:1 37:9 38:4 40:1 41:109
42:13 44:3 45:25 46:4 47:1 49:8
58:16 59:17 60:6 61:2 62:5 63:3
64:30 66:16 67:31 68:1 69:10 70:2
72:7 74:16 76:29 77:6 78:3 79:9
80:8 81:23 82:3 83:7 84:6 85:31
87:1 89:10 91:36 93:14 94:2 95:2
96:5 98:2 101:2 102:1 103:294 104:76
108:4 109:1 111:17 114:3 116:6 117:1
118:33 119:31 121:28 122:8 123:8 124:42
128:33 129:34 130:94 131:53 132:53 133:156
134:75 136:198 137:46 138:10 139:10 140:26
141:2 142:25 143:14 144:24 145:2 146:122
147:15 148:9 149:11 150:38 151:5 152:112
153:14 154:20 155:40 156:128 157:11 158:27
159:116 160:34 161:8 162:17 163:61 164:12
165:3 167:10 168:35 169:6 170:13 172:2
173:5 177:1 179:9 180:16 182:3 184:6
185:35 186:2 187:8 188:12 190:1 191:2
192:1153 193:252 194:84 195:67 196:11 197:273
198:337 199:200 200:253 201:2 202:387 203:186
204:315 205:102 206:160 207:196 208:48 209:81
210:109 211:2 212:39 213:4 216:52 217:22
219:7 222:3 223:5
End of report
More information about the ren-bgp-stats-all
mailing list