[REN-BGP-stats-all] IPv4 R&E Routing Table Report - BDREN (R&E) view
REN Routing Table Report
cscora at bgp.nsrc.org
Sun Jun 1 19:05:42 UTC 2025
IPv4 R&E Routing Table Report 19:05 GMT Sun 01 Jun, 2025
IPv4 BGP Table (R&E) as seen at BDREN.
Report Website: https://bgp.nsrc.org/REN
Detailed Analysis: https://bgp.nsrc.org/REN/BDREN/
Analysis Summary
----------------
BGP routing table entries examined: 18603
Prefixes after maximum aggregation (per Origin AS): 10182
Deaggregation factor: 1.83
Unique aggregates announced (without unneeded subnets): 11181
Number of IPv4 prefixes with a valid ROA: 7474
Number of IPv4 prefixes with an invalid ROA: 29
Number of IPv4 prefixes with no ROA: 11100
Total ASes present in the Internet Routing Table: 2693
Prefixes per ASN: 6.91
Origin-only ASes present in the Internet Routing Table: 2344
Origin ASes announcing only one prefix: 1043
Transit ASes present in the Internet Routing Table: 349
Transit-only ASes present in the Internet Routing Table: 52
Paths with bogon ASNs present in the IPv4 Routing Table: 0
Average AS path length visible in the Internet Routing Table: 6.2
Max AS path length visible: 11
Max AS path prepend of ASN ( 45768) 8
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: 46553
Number of 32-bit ASNs visible in the Routing Table: 677
Prefixes from 32-bit ASNs in the Routing Table: 1813
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: 189506816
Equivalent to 11 /8s, 75 /16s and 165 /24s
Percentage of available address space announced: 5.1
Percentage of allocated address space announced: 5.1
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: 2207
APNIC Region Analysis Summary
-----------------------------
Prefixes being announced by APNIC Region ASes: 4762
Total APNIC prefixes after maximum aggregation: 2289
APNIC Deaggregation factor: 2.08
Prefixes being announced from the APNIC address blocks: 4761
Unique aggregates announced from the APNIC address blocks: 2642
APNIC Region origin ASes present in the Internet Routing Table: 599
APNIC Prefixes per ASN: 7.95
APNIC Region origin ASes announcing only one prefix: 252
APNIC Region transit ASes present in the Internet Routing Table: 50
Average APNIC Region AS path length visible: 4.7
Max APNIC Region AS path length visible: 11
Number of APNIC region 32-bit ASNs visible in the Routing Table: 242
Number of APNIC addresses announced to Internet: 39826688
Equivalent to 2 /8s, 95 /16s and 181 /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: 8003
Total ARIN prefixes after maximum aggregation: 4450
ARIN Deaggregation factor: 1.80
Prefixes being announced from the ARIN address blocks: 8052
Unique aggregates announced from the ARIN address blocks: 4913
ARIN Region origin ASes present in the Internet Routing Table: 1228
ARIN Prefixes per ASN: 6.56
ARIN Region origin ASes announcing only one prefix: 436
ARIN Region transit ASes present in the Internet Routing Table: 152
Average ARIN Region AS path length visible: 7.3
Max ARIN Region AS path length visible: 11
Number of ARIN region 32-bit ASNs visible in the Routing Table: 213
Number of ARIN addresses announced to Internet: 85433088
Equivalent to 5 /8s, 23 /16s and 155 /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: 3587
Total RIPE prefixes after maximum aggregation: 2884
RIPE Deaggregation factor: 1.24
Prefixes being announced from the RIPE address blocks: 3571
Unique aggregates announced from the RIPE address blocks: 2923
RIPE Region origin ASes present in the Internet Routing Table: 656
RIPE Prefixes per ASN: 5.44
RIPE Region origin ASes announcing only one prefix: 291
RIPE Region transit ASes present in the Internet Routing Table: 107
Average RIPE Region AS path length visible: 5.2
Max RIPE Region AS path length visible: 11
Number of RIPE region 32-bit ASNs visible in the Routing Table: 151
Number of RIPE addresses announced to Internet: 57931008
Equivalent to 3 /8s, 115 /16s and 245 /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: 1094
Total LACNIC prefixes after maximum aggregation: 394
LACNIC Deaggregation factor: 2.78
Prefixes being announced from the LACNIC address blocks: 1093
Unique aggregates announced from the LACNIC address blocks: 491
LACNIC Region origin ASes present in the Internet Routing Table: 119
LACNIC Prefixes per ASN: 9.18
LACNIC Region origin ASes announcing only one prefix: 49
LACNIC Region transit ASes present in the Internet Routing Table: 18
Average LACNIC Region AS path length visible: 7.4
Max LACNIC Region AS path length visible: 11
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 54
Number of LACNIC addresses announced to Internet: 3866880
Equivalent to 0 /8s, 59 /16s and 1 /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: 1124
Total AfriNIC prefixes after maximum aggregation: 160
AfriNIC Deaggregation factor: 7.03
Prefixes being announced from the AfriNIC address blocks: 1123
Unique aggregates announced from the AfriNIC address blocks: 209
AfriNIC Region origin ASes present in the Internet Routing Table: 37
AfriNIC Prefixes per ASN: 30.35
AfriNIC Region origin ASes announcing only one prefix: 15
AfriNIC Region transit ASes present in the Internet Routing Table: 9
Average AfriNIC Region AS path length visible: 7.1
Max AfriNIC Region AS path length visible: 11
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 17
Number of AfriNIC addresses announced to Internet: 2446592
Equivalent to 0 /8s, 37 /16s and 85 /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 583 2169 461 SINET-AS Research Organization of Informa
7497 456 180 24 CSTNET-AS-AP Computer Network Information
1237 194 74 146 KREONET-AS-KR KISTI, KR
4538 193 4192 72 ERX-CERNET-BKB China Education and Resear
58647 182 18 2 KAGAWAU-AS Kagawa University, JP
7575 173 281 116 AARNET-AS-AP Australian Academic and Rese
55824 148 19 21 NKN-CORE-NW NKN Core Network, IN
4762 75 4 1 MAHIDOL-BORDER-AS Mahidol University, Tha
4621 66 37 9 UNINET-AS-AP UNINET-, TH
23570 59 5 11 INCHEON-AS-KR UNIVERSITY OF INCHEON, KR
Complete listing at https://bgp.nsrc.org/REN/BDREN/data-ASnet-APNIC
ARIN Region per AS prefix count summary
---------------------------------------
ASN No of nets /20 equiv MaxAgg Description
2152 551 507 99 CENIC-2152, US
2920 229 44 49 LACOE, US
376 200 162 150 RISQ-AS, CA
5786 199 16 1 UPRENET, PR
18558 140 18 5 NETBLK-RCOEK, US
81 129 519 34 NCREN, US
23024 98 7 19 OCDE, US
21976 90 34 16 NJEDGE-NET, US
237 85 542 51 MERIT-AS-14, US
1736 79 16 1 MU-AS, US
Complete listing at https://bgp.nsrc.org/REN/BDREN/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
8895 109 24 5 ISU Internet Services Unit ISU, SA
1103 97 1727 83 SURFNET-NL SURFnet, The Netherlands, NL
2614 92 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
3267 75 29 69 NIKS, RU
Complete listing at https://bgp.nsrc.org/REN/BDREN/data-ASnet-RIPE
LACNIC Region per AS prefix count summary
-----------------------------------------
ASN No of nets /20 equiv MaxAgg Description
1916 242 178 41 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 52 100 36 Fundacao Carlos Chagas Filho de Amparo a
61468 52 3 21 CEDIA, EC
19611 48 17 2 Associacao Antonio Vieira - Unisinos, BR
28614 38 2 2 Fundacao Universidade Regional de Blumena
1251 37 31 26 FUNDACAO DE AMPARO A PESQUISA DO ESTADO S
3596 37 8 4 Universidad Autonoma Metropolitana, MX
21612 27 16 1 FUNDACAO INSTITUTO OSWALDO CRUZ, BR
Complete listing at https://bgp.nsrc.org/REN/BDREN/data-ASnet-LACNIC
AfriNIC Region per AS prefix count summary
------------------------------------------
ASN No of nets /20 equiv MaxAgg Description
36914 547 82 3 KENET-AS, KE
2018 373 318 69 TENET-1, ZA
8094 47 48 18 PUKNET, ZA
37215 36 8 1 MAREN, MW
6879 24 2 9 ENSTINET-, EG
37501 11 49 6 UOFS, ZA
327700 11 16 1 MoRENet, MZ
37654 10 1 6 RwEdNet-AS, RW
37661 9 6 3 NRaE1-AS, NG
36982 8 33 8 UCT, ZA
Complete listing at https://bgp.nsrc.org/REN/BDREN/data-ASnet-AFRINIC
Global Per AS prefix count summary
----------------------------------
ASN No of nets /20 equiv MaxAgg Description
2907 583 2169 461 SINET-AS Research Organization of Informa
2152 551 507 99 CENIC-2152, US
36914 547 82 3 KENET-AS, KE
7497 456 180 24 CSTNET-AS-AP Computer Network Information
2018 373 318 69 TENET-1, ZA
680 284 1899 250 DFN Verein zur Foerderung eines Deutschen
1916 242 178 41 Rede Nacional de Ensino e Pesquisa, BR
2920 229 44 49 LACOE, US
376 200 162 150 RISQ-AS, CA
5786 199 16 1 UPRENET, PR
Complete listing at https://bgp.nsrc.org/REN/BDREN/data-ASnet
Global Per AS Maximum Aggregation summary
-----------------------------------------
ASN No of nets Net Savings Description
36914 547 544 KENET-AS, KE
2152 551 452 CENIC-2152, US
7497 456 432 CSTNET-AS-AP Computer Network Information Cente
2018 373 304 TENET-1, ZA
1916 242 201 Rede Nacional de Ensino e Pesquisa, BR
5786 199 198 UPRENET, PR
2920 229 180 LACOE, US
58647 182 180 KAGAWAU-AS Kagawa University, JP
18558 140 135 NETBLK-RCOEK, US
55824 148 127 NKN-CORE-NW NKN Core Network, IN
Complete listing at https://bgp.nsrc.org/REN/BDREN/data-CIDRnet
List of Unregistered Origin ASNs (Global)
-----------------------------------------
Bad AS Designation Net Originated Transit AS Transit AS Name
26971 UNALLOCATED 129.111.0.0/16 276 OTS-AS-276, 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/BDREN/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
202.14.117.0/24 Origin: 17827 STOU-AS-TH Sukhothai Thammathirat Open U
202.14.117.0/24 Transit: 4621 UNINET-AS-AP UNINET-, TH
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/BDREN/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 /12:10
/13:17 /14:32 /15:110 /16:1904 /17:408 /18:455
/19:574 /20:807 /21:817 /22:1410 /23:1560 /24:10497
/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 523 547 KENET-AS, KE
8895 106 109 ISU Internet Services Unit ISU, SA
2152 65 551 CENIC-2152, US
23024 38 98 OCDE, US
28614 32 38 Fundacao Universidade Regional de Blumenau, BR
46115 32 35 LUTHER, US
3267 31 75 NIKS, RU
32440 31 56 LONI, US
200521 31 56 SEAP-AGE, ES
25977 30 44 HCCS, US
Complete listing at https://bgp.nsrc.org/REN/BDREN/data-sXXas-nos
Number of /24s announced per /8 block (Global)
----------------------------------------------
1:2 5:16 8:2 12:2 14:93 23:9
24:3 31:1 35:10 37:9 38:11 40:1
41:221 42:18 44:5 45:41 46:5 47:1
49:12 50:2 52:1 58:15 59:20 60:6
61:3 62:8 63:32 64:42 65:5 66:42
67:39 68:5 69:17 70:2 71:1 72:8
74:54 76:34 77:9 78:3 79:9 80:13
81:11 82:6 83:8 84:5 85:48 86:6
87:1 89:10 91:41 92:2 93:15 94:2
95:1 96:5 97:1 98:2 101:3 102:4
103:357 104:76 108:8 109:2 111:21 113:1
114:24 116:9 117:61 118:35 119:31 121:28
122:8 123:8 124:42 125:5 128:57 129:42
130:99 131:62 132:64 133:155 134:106 136:200
137:103 138:10 139:5 140:31 141:4 142:27
143:27 144:33 145:2 146:137 147:46 148:41
149:12 150:38 151:11 152:138 153:15 154:45
155:83 156:128 157:26 158:28 159:117 160:34
161:18 162:22 163:63 164:10 165:42 167:26
168:103 169:7 170:18 171:1 172:2 173:5
175:16 177:4 179:12 180:16 181:1 182:12
184:3 185:50 186:3 187:25 188:15 189:3
190:17 191:13 192:1368 193:297 194:140 195:82
196:147 197:333 198:509 199:241 200:296 201:37
202:629 203:445 204:381 205:172 206:198 207:304
208:65 209:160 210:210 211:4 212:147 213:4
216:87 217:22 218:23 219:7 220:16 222:4
223:17
End of report
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