[REN-BGP-stats-all] IPv4 R&E Routing Table Report - WACREN (R&E) view
REN Routing Table Report
cscora at bgp.nsrc.org
Sat Jul 26 18:10:48 UTC 2025
IPv4 R&E Routing Table Report 18:10 GMT Sat 26 Jul, 2025
IPv4 BGP Table (R&E) as seen at WACREN.
Report Website: https://bgp.nsrc.org/REN
Detailed Analysis: https://bgp.nsrc.org/REN/WACREN/
Analysis Summary
----------------
BGP routing table entries examined: 14294
Prefixes after maximum aggregation (per Origin AS): 8445
Deaggregation factor: 1.69
Unique aggregates announced (without unneeded subnets): 9397
Number of IPv4 prefixes with a valid ROA: 6608
Number of IPv4 prefixes with an invalid ROA: 10
Number of IPv4 prefixes with no ROA: 7676
Total ASes present in the Internet Routing Table: 2190
Prefixes per ASN: 6.53
Origin-only ASes present in the Internet Routing Table: 1916
Origin ASes announcing only one prefix: 876
Transit ASes present in the Internet Routing Table: 274
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: 4.3
Max AS path length visible: 13
Max AS path prepend of ASN (199561) 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: 46946
Number of 32-bit ASNs visible in the Routing Table: 568
Prefixes from 32-bit ASNs in the Routing Table: 1447
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: 3
Number of addresses announced to Internet: 159074992
Equivalent to 9 /8s, 123 /16s and 74 /24s
Percentage of available address space announced: 4.3
Percentage of allocated address space announced: 4.3
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: 1823
APNIC Region Analysis Summary
-----------------------------
Prefixes being announced by APNIC Region ASes: 3780
Total APNIC prefixes after maximum aggregation: 1926
APNIC Deaggregation factor: 1.96
Prefixes being announced from the APNIC address blocks: 3779
Unique aggregates announced from the APNIC address blocks: 2107
APNIC Region origin ASes present in the Internet Routing Table: 457
APNIC Prefixes per ASN: 8.27
APNIC Region origin ASes announcing only one prefix: 208
APNIC Region transit ASes present in the Internet Routing Table: 41
Average APNIC Region AS path length visible: 4.2
Max APNIC Region AS path length visible: 13
Number of APNIC region 32-bit ASNs visible in the Routing Table: 206
Number of APNIC addresses announced to Internet: 43184352
Equivalent to 2 /8s, 146 /16s and 240 /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: 5205
Total ARIN prefixes after maximum aggregation: 3376
ARIN Deaggregation factor: 1.54
Prefixes being announced from the ARIN address blocks: 5254
Unique aggregates announced from the ARIN address blocks: 3900
ARIN Region origin ASes present in the Internet Routing Table: 941
ARIN Prefixes per ASN: 5.58
ARIN Region origin ASes announcing only one prefix: 330
ARIN Region transit ASes present in the Internet Routing Table: 118
Average ARIN Region AS path length visible: 4.9
Max ARIN Region AS path length visible: 10
Number of ARIN region 32-bit ASNs visible in the Routing Table: 152
Number of ARIN addresses announced to Internet: 55330048
Equivalent to 3 /8s, 76 /16s and 69 /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: 3273
Total RIPE prefixes after maximum aggregation: 2625
RIPE Deaggregation factor: 1.25
Prefixes being announced from the RIPE address blocks: 3258
Unique aggregates announced from the RIPE address blocks: 2695
RIPE Region origin ASes present in the Internet Routing Table: 608
RIPE Prefixes per ASN: 5.36
RIPE Region origin ASes announcing only one prefix: 276
RIPE Region transit ASes present in the Internet Routing Table: 90
Average RIPE Region AS path length visible: 3.6
Max RIPE Region AS path length visible: 13
Number of RIPE region 32-bit ASNs visible in the Routing Table: 141
Number of RIPE addresses announced to Internet: 55485200
Equivalent to 3 /8s, 78 /16s and 163 /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: 877
Total LACNIC prefixes after maximum aggregation: 344
LACNIC Deaggregation factor: 2.55
Prefixes being announced from the LACNIC address blocks: 874
Unique aggregates announced from the LACNIC address blocks: 463
LACNIC Region origin ASes present in the Internet Routing Table: 93
LACNIC Prefixes per ASN: 9.40
LACNIC Region origin ASes announcing only one prefix: 37
LACNIC Region transit ASes present in the Internet Routing Table: 15
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: 39
Number of LACNIC addresses announced to Internet: 2716352
Equivalent to 0 /8s, 41 /16s and 114 /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: 1127
Total AfriNIC prefixes after maximum aggregation: 170
AfriNIC Deaggregation factor: 6.63
Prefixes being announced from the AfriNIC address blocks: 1126
Unique aggregates announced from the AfriNIC address blocks: 229
AfriNIC Region origin ASes present in the Internet Routing Table: 48
AfriNIC Prefixes per ASN: 23.46
AfriNIC Region origin ASes announcing only one prefix: 25
AfriNIC Region transit ASes present in the Internet Routing Table: 7
Average AfriNIC Region AS path length visible: 4.0
Max AfriNIC Region AS path length visible: 8
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 30
Number of AfriNIC addresses announced to Internet: 2352640
Equivalent to 0 /8s, 35 /16s and 230 /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 612 2169 462 SINET-AS Research Organization of Informa
7497 453 180 23 CSTNET-AS-AP Computer Network Information
1237 194 74 146 KREONET-AS-KR KISTI, KR
4538 191 4160 70 ERX-CERNET-BKB China Education and Resear
58647 182 18 2 KAGAWAU-AS Kagawa University, JP
7575 164 249 113 AARNET-AS-AP Australian Academic and Rese
55824 148 19 21 NKN-CORE-NW NKN Core Network, IN
6262 63 134 56 CSIRO Commonwealth Scientific and Industr
2697 56 4 33 ERX-ERNET-AS Education and Research Netwo
1659 54 1448 30 ERX-TANET-ASN1 Taiwan Academic Network TA
Complete listing at https://bgp.nsrc.org/REN/WACREN/data-ASnet-APNIC
ARIN Region per AS prefix count summary
---------------------------------------
ASN No of nets /20 equiv MaxAgg Description
376 201 162 151 RISQ-AS, CA
81 127 471 35 NCREN, US
18558 101 7 41 NETBLK-RCOEK, US
21976 90 34 16 NJEDGE-NET, US
1736 78 16 1 MU-AS, US
237 75 525 42 MERIT-AS-14, US
3477 75 63 38 NOAA-NWAVE, US
5786 73 5 47 UPRENET, PR
15296 64 5 54 CYBERA, CA
7939 61 16 10 UNIVCENTFLA, US
Complete listing at https://bgp.nsrc.org/REN/WACREN/data-ASnet-ARIN
RIPE Region per AS prefix count summary
---------------------------------------
ASN No of nets /20 equiv MaxAgg Description
680 288 1899 250 DFN Verein zur Foerderung eines Deutschen
786 193 1742 187 JANET Jisc Services Limited, GB
559 114 533 104 SWITCH Peering requests: peering at switch.c
8895 109 24 5 ISU Internet Services Unit ISU, SA
1103 99 1759 85 SURFNET-NL SURFnet, The Netherlands, NL
2614 92 26 69 ROEDUNET, RO
137 82 677 77 ASGARR Consortium GARR, IT
1930 78 88 73 RCCN Fundacao para a Ciencia e a Tecnolog
3267 72 21 68 NIKS, RU
2200 63 614 58 FR-RENATER Reseau National de telecommuni
Complete listing at https://bgp.nsrc.org/REN/WACREN/data-ASnet-RIPE
LACNIC Region per AS prefix count summary
-----------------------------------------
ASN No of nets /20 equiv MaxAgg Description
1916 328 177 43 Rede Nacional de Ensino e Pesquisa, BR
11340 110 25 52 Red Universitaria Nacional, CL
271640 66 4 29 UNIVERSIDADE FEDERAL DE VICOSA, BR
61468 45 3 21 CEDIA, EC
1251 37 31 26 FUNDACAO DE AMPARO A PESQUISA DO ESTADO S
21612 25 16 1 FUNDACAO INSTITUTO OSWALDO CRUZ, BR
278 20 32 4 Universidad Nacional Autonoma de Mexico,
28027 13 2 6 Escuela Superior Politecnica del Litoral,
28571 13 37 12 UNIVERSIDADE DE SAO PAULO, BR
2716 11 28 10 Universidade Federal do Rio Grande do Sul
Complete listing at https://bgp.nsrc.org/REN/WACREN/data-ASnet-LACNIC
AfriNIC Region per AS prefix count summary
------------------------------------------
ASN No of nets /20 equiv MaxAgg Description
36914 524 82 3 KENET-AS, KE
2018 375 318 69 TENET-1, ZA
8094 47 48 18 PUKNET, ZA
37215 37 8 1 MAREN, MW
6879 24 2 9 ENSTINET-, EG
30983 12 4 2 MARWAN-AS, MA
37501 11 49 6 UOFS, ZA
327700 11 16 1 MoRENet, MZ
37654 10 1 6 RwEdNet-AS, RW
36982 8 33 8 UCT, ZA
Complete listing at https://bgp.nsrc.org/REN/WACREN/data-ASnet-AFRINIC
Global Per AS prefix count summary
----------------------------------
ASN No of nets /20 equiv MaxAgg Description
2907 612 2169 462 SINET-AS Research Organization of Informa
36914 524 82 3 KENET-AS, KE
7497 453 180 23 CSTNET-AS-AP Computer Network Information
2018 375 318 69 TENET-1, ZA
1916 328 177 43 Rede Nacional de Ensino e Pesquisa, BR
680 288 1899 250 DFN Verein zur Foerderung eines Deutschen
376 201 162 151 RISQ-AS, CA
1237 194 74 146 KREONET-AS-KR KISTI, KR
786 193 1742 187 JANET Jisc Services Limited, GB
4538 191 4160 70 ERX-CERNET-BKB China Education and Resear
Complete listing at https://bgp.nsrc.org/REN/WACREN/data-ASnet
Global Per AS Maximum Aggregation summary
-----------------------------------------
ASN No of nets Net Savings Description
36914 524 521 KENET-AS, KE
7497 453 430 CSTNET-AS-AP Computer Network Information Cente
2018 375 306 TENET-1, ZA
1916 328 285 Rede Nacional de Ensino e Pesquisa, BR
58647 182 180 KAGAWAU-AS Kagawa University, JP
55824 148 127 NKN-CORE-NW NKN Core Network, IN
4538 191 121 ERX-CERNET-BKB China Education and Research Net
8895 109 104 ISU Internet Services Unit ISU, SA
81 127 92 NCREN, US
1736 78 77 MU-AS, US
Complete listing at https://bgp.nsrc.org/REN/WACREN/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/WACREN/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
202.46.0.0/20 Origin: 147171 IDNIC-BRIN-AS-ID Badan Riset dan Inovasi
202.46.0.0/20 Transit: 64302 IDNIC-IDREN-AS-ID IDREN - Indonesia Rese
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/WACREN/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 /11:1 /12:11
/13:18 /14:35 /15:100 /16:1632 /17:329 /18:351
/19:467 /20:627 /21:658 /22:1087 /23:1216 /24:7560
/25:64 /26:80 /27:35 /28:5 /29:10 /30:4
/31:1 /32:3
Advertised prefixes smaller than registry allocations
-----------------------------------------------------
ASN No of nets Total ann. Description
36914 500 524 KENET-AS, KE
8895 106 109 ISU Internet Services Unit ISU, SA
1916 88 328 Rede Nacional de Ensino e Pesquisa, BR
200521 34 59 SEAP-AGE, ES
3267 31 72 NIKS, RU
37215 31 37 MAREN, MW
26898 24 64 RESERVED, ZZ
36794 24 26 META SOLUTIONS PIKETON, US
61468 23 45 CEDIA, EC
31638 21 21 ASN-LEPIDA, IT
Complete listing at https://bgp.nsrc.org/REN/WACREN/data-sXXas-nos
Number of /24s announced per /8 block (Global)
----------------------------------------------
1:1 5:16 8:2 12:1 14:93 23:5
24:3 31:1 35:4 37:6 38:4 40:1
41:178 42:14 44:3 45:36 46:4 49:8
50:1 58:16 59:18 60:6 61:2 62:8
63:1 64:34 65:3 66:15 67:4 68:2
69:6 70:2 71:1 72:7 74:21 76:11
77:9 78:3 79:9 80:13 81:27 82:5
83:7 84:3 85:43 86:3 87:1 89:9
91:37 92:2 93:8 94:2 95:2 96:5
98:2 101:3 102:10 103:296 104:5 108:8
109:3 111:17 114:8 116:7 118:34 119:31
121:28 122:8 123:8 124:42 125:2 128:29
129:24 130:87 131:55 132:64 133:156 134:106
136:79 137:34 138:11 139:3 140:26 141:3
142:22 143:22 144:25 145:4 146:112 147:17
148:8 149:9 150:18 151:10 152:97 153:6
154:42 155:63 156:13 157:24 158:26 159:113
160:34 161:14 162:18 163:47 164:8 165:4
167:12 168:80 169:5 170:12 171:1 172:1
177:3 179:9 180:14 182:1 184:5 185:42
186:4 187:7 188:15 190:15 191:3 192:1190
193:233 194:106 195:69 196:148 197:355 198:303
199:206 200:267 201:5 202:349 203:275 204:275
205:97 206:138 207:110 208:46 209:59 210:200
211:3 212:147 213:4 216:34 217:22 218:2
219:6 220:3 222:3 223:5
End of report
More information about the ren-bgp-stats-all
mailing list