[REN-BGP-stats-all] IPv4 R&E Routing Table Report - BDREN (R&E) view
REN Routing Table Report
cscora at bgp.nsrc.org
Tue Jun 3 19:05:38 UTC 2025
IPv4 R&E Routing Table Report 19:05 GMT Tue 03 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: 18488
Prefixes after maximum aggregation (per Origin AS): 10135
Deaggregation factor: 1.82
Unique aggregates announced (without unneeded subnets): 11124
Number of IPv4 prefixes with a valid ROA: 7491
Number of IPv4 prefixes with an invalid ROA: 29
Number of IPv4 prefixes with no ROA: 10968
Total ASes present in the Internet Routing Table: 2667
Prefixes per ASN: 6.93
Origin-only ASes present in the Internet Routing Table: 2319
Origin ASes announcing only one prefix: 1028
Transit ASes present in the Internet Routing Table: 348
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: 46558
Number of 32-bit ASNs visible in the Routing Table: 676
Prefixes from 32-bit ASNs in the Routing Table: 1796
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: 188069888
Equivalent to 11 /8s, 53 /16s and 184 /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: 2204
APNIC Region Analysis Summary
-----------------------------
Prefixes being announced by APNIC Region ASes: 4784
Total APNIC prefixes after maximum aggregation: 2296
APNIC Deaggregation factor: 2.08
Prefixes being announced from the APNIC address blocks: 4783
Unique aggregates announced from the APNIC address blocks: 2658
APNIC Region origin ASes present in the Internet Routing Table: 598
APNIC Prefixes per ASN: 8.00
APNIC Region origin ASes announcing only one prefix: 250
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: 39834880
Equivalent to 2 /8s, 95 /16s and 213 /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: 7858
Total ARIN prefixes after maximum aggregation: 4396
ARIN Deaggregation factor: 1.79
Prefixes being announced from the ARIN address blocks: 7906
Unique aggregates announced from the ARIN address blocks: 4839
ARIN Region origin ASes present in the Internet Routing Table: 1203
ARIN Prefixes per ASN: 6.57
ARIN Region origin ASes announcing only one prefix: 423
ARIN Region transit ASes present in the Internet Routing Table: 150
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: 210
Number of ARIN addresses announced to Internet: 83989760
Equivalent to 5 /8s, 1 /16s and 149 /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: 3585
Total RIPE prefixes after maximum aggregation: 2882
RIPE Deaggregation factor: 1.24
Prefixes being announced from the RIPE address blocks: 3570
Unique aggregates announced from the RIPE address blocks: 2922
RIPE Region origin ASes present in the Internet Routing Table: 654
RIPE Prefixes per ASN: 5.46
RIPE Region origin ASes announcing only one prefix: 289
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: 57927936
Equivalent to 3 /8s, 115 /16s and 233 /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: 1097
Total LACNIC prefixes after maximum aggregation: 394
LACNIC Deaggregation factor: 2.78
Prefixes being announced from the LACNIC address blocks: 1096
Unique aggregates announced from the LACNIC address blocks: 491
LACNIC Region origin ASes present in the Internet Routing Table: 119
LACNIC Prefixes per ASN: 9.21
LACNIC Region origin ASes announcing only one prefix: 49
LACNIC Region transit ASes present in the Internet Routing Table: 19
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: 1131
Total AfriNIC prefixes after maximum aggregation: 162
AfriNIC Deaggregation factor: 6.98
Prefixes being announced from the AfriNIC address blocks: 1130
Unique aggregates announced from the AfriNIC address blocks: 211
AfriNIC Region origin ASes present in the Internet Routing Table: 39
AfriNIC Prefixes per ASN: 28.97
AfriNIC Region origin ASes announcing only one prefix: 17
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: 19
Number of AfriNIC addresses announced to Internet: 2447872
Equivalent to 0 /8s, 37 /16s and 90 /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 595 2170 464 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 174 282 117 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 549 507 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 99 7 17 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 551 82 3 KENET-AS, KE
2018 374 318 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 595 2170 464 SINET-AS Research Organization of Informa
36914 551 82 3 KENET-AS, KE
2152 549 507 99 CENIC-2152, US
7497 456 180 24 CSTNET-AS-AP Computer Network Information
2018 374 318 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 551 548 KENET-AS, KE
2152 549 450 CENIC-2152, US
7497 456 432 CSTNET-AS-AP Computer Network Information Cente
2018 374 305 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 /16:1889 /17:382 /18:423
/19:567 /20:793 /21:816 /22:1406 /23:1557 /24:10484
/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 527 551 KENET-AS, KE
8895 106 109 ISU Internet Services Unit ISU, SA
2152 65 549 CENIC-2152, US
23024 38 99 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 38:10 40:1
41:223 42:18 44:5 45:45 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 66:41
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
103:360 104:77 108:8 109:2 111:21 113:1
114:24 116:9 117:61 118:35 119:31 121:28
122:8 123:8 124:42 125:5 128:55 129:42
130:99 131:62 132:67 133:156 134:106 136:200
137:102 138:10 139:5 140:27 141:4 142:27
143:24 144:33 145:2 146:137 147:46 148:41
149:12 150:38 151:11 152:137 153:15 154:47
155:83 156:128 157:26 158:28 159:117 160:34
161:18 162:18 163:63 164:10 165:42 167:21
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
190:17 191:13 192:1356 193:297 194:140 195:82
196:149 197:335 198:508 199:244 200:296 201:37
202:636 203:445 204:380 205:172 206:198 207:301
208:65 209:156 210:210 211:4 212:147 213:4
216:87 217:22 218:23 219:7 220:16 222:4
223:17
End of report
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