[REN-BGP-stats-all] IPv4 R&E Routing Table Report - URAN (R&E) view
REN Routing Table Report
cscora at bgp.nsrc.org
Fri Mar 7 17:10:43 UTC 2025
IPv4 R&E Routing Table Report 17:10 GMT Fri 07 Mar, 2025
IPv4 BGP Table (R&E) as seen at URAN.
Report Website: https://bgp.nsrc.org/REN
Detailed Analysis: https://bgp.nsrc.org/REN/URAN/
Analysis Summary
----------------
BGP routing table entries examined: 18963
Prefixes after maximum aggregation (per Origin AS): 10398
Deaggregation factor: 1.82
Unique aggregates announced (without unneeded subnets): 11511
Number of IPv4 prefixes with a valid ROA: 7483
Number of IPv4 prefixes with an invalid ROA: 2
Number of IPv4 prefixes with no ROA: 11478
Total ASes present in the Internet Routing Table: 2714
Prefixes per ASN: 6.99
Origin-only ASes present in the Internet Routing Table: 2362
Origin ASes announcing only one prefix: 1041
Transit ASes present in the Internet Routing Table: 352
Transit-only ASes present in the Internet Routing Table: 57
Paths with bogon ASNs present in the IPv4 Routing Table: 0
Average AS path length visible in the Internet Routing Table: 4.9
Max AS path length visible: 18
Max AS path prepend of ASN (395156) 12
Prefixes from unregistered ASNs in the Routing Table: 1
Number of instances of unregistered ASNs: 1
Number of 32-bit ASNs allocated by the RIRs: 46172
Number of 32-bit ASNs visible in the Routing Table: 686
Prefixes from 32-bit ASNs in the Routing Table: 1872
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: 199302224
Equivalent to 11 /8s, 225 /16s and 28 /24s
Percentage of available address space announced: 5.4
Percentage of allocated address space announced: 5.4
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: 2238
APNIC Region Analysis Summary
-----------------------------
Prefixes being announced by APNIC Region ASes: 4822
Total APNIC prefixes after maximum aggregation: 2310
APNIC Deaggregation factor: 2.09
Prefixes being announced from the APNIC address blocks: 4821
Unique aggregates announced from the APNIC address blocks: 2665
APNIC Region origin ASes present in the Internet Routing Table: 599
APNIC Prefixes per ASN: 8.05
APNIC Region origin ASes announcing only one prefix: 250
APNIC Region transit ASes present in the Internet Routing Table: 56
Average APNIC Region AS path length visible: 5.1
Max APNIC Region AS path length visible: 15
Number of APNIC region 32-bit ASNs visible in the Routing Table: 245
Number of APNIC addresses announced to Internet: 45501792
Equivalent to 2 /8s, 182 /16s and 77 /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: 8116
Total ARIN prefixes after maximum aggregation: 4723
ARIN Deaggregation factor: 1.72
Prefixes being announced from the ARIN address blocks: 8132
Unique aggregates announced from the ARIN address blocks: 5239
ARIN Region origin ASes present in the Internet Routing Table: 1257
ARIN Prefixes per ASN: 6.47
ARIN Region origin ASes announcing only one prefix: 439
ARIN Region transit ASes present in the Internet Routing Table: 151
Average ARIN Region AS path length visible: 5.2
Max ARIN Region AS path length visible: 16
Number of ARIN region 32-bit ASNs visible in the Routing Table: 210
Number of ARIN addresses announced to Internet: 90520032
Equivalent to 5 /8s, 101 /16s and 57 /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: 3316
Total RIPE prefixes after maximum aggregation: 2657
RIPE Deaggregation factor: 1.25
Prefixes being announced from the RIPE address blocks: 3304
Unique aggregates announced from the RIPE address blocks: 2678
RIPE Region origin ASes present in the Internet Routing Table: 598
RIPE Prefixes per ASN: 5.53
RIPE Region origin ASes announcing only one prefix: 273
RIPE Region transit ASes present in the Internet Routing Table: 100
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: 139
Number of RIPE addresses announced to Internet: 56731856
Equivalent to 3 /8s, 97 /16s and 168 /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: 1555
Total LACNIC prefixes after maximum aggregation: 537
LACNIC Deaggregation factor: 2.90
Prefixes being announced from the LACNIC address blocks: 1551
Unique aggregates announced from the LACNIC address blocks: 701
LACNIC Region origin ASes present in the Internet Routing Table: 154
LACNIC Prefixes per ASN: 10.07
LACNIC Region origin ASes announcing only one prefix: 51
LACNIC Region transit ASes present in the Internet Routing Table: 22
Average LACNIC Region AS path length visible: 5.6
Max LACNIC Region AS path length visible: 14
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 64
Number of LACNIC addresses announced to Internet: 4133696
Equivalent to 0 /8s, 63 /16s and 19 /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: 1153
Total AfriNIC prefixes after maximum aggregation: 170
AfriNIC Deaggregation factor: 6.78
Prefixes being announced from the AfriNIC address blocks: 1152
Unique aggregates announced from the AfriNIC address blocks: 225
AfriNIC Region origin ASes present in the Internet Routing Table: 48
AfriNIC Prefixes per ASN: 24.00
AfriNIC Region origin ASes announcing only one prefix: 28
AfriNIC Region transit ASes present in the Internet Routing Table: 9
Average AfriNIC Region AS path length visible: 4.6
Max AfriNIC Region AS path length visible: 18
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 28
Number of AfriNIC addresses announced to Internet: 2412288
Equivalent to 0 /8s, 36 /16s and 207 /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 640 2170 465 SINET-AS Research Organization of Informa
7497 452 180 24 CSTNET-AS-AP Computer Network Information
1237 195 74 146 KREONET-AS-KR KISTI, KR
58647 183 18 2 KAGAWAU-AS Kagawa University, JP
7575 173 297 116 AARNET-AS-AP Australian Academic and Rese
55824 146 19 20 NKN-CORE-NW NKN Core Network, IN
4538 141 4192 70 ERX-CERNET-BKB China Education and Resear
4762 75 4 1 MAHIDOL-BORDER-AS Mahidol University, Tha
1659 61 1466 35 ERX-TANET-ASN1 Taiwan Academic Network TA
4621 60 35 8 UNINET-AS-AP UNINET-, TH
Complete listing at https://bgp.nsrc.org/REN/URAN/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
668 199 642 169 DNIC-AS-00668, US
5786 198 16 1 UPRENET, PR
2920 173 34 7 LACOE, US
2152 149 507 97 CENIC-2152, US
18558 139 18 4 NETBLK-RCOEK, US
81 129 519 34 NCREN, US
23024 97 7 17 OCDE, US
21976 88 34 14 NJEDGE-NET, US
237 85 542 51 MERIT-AS-14, US
Complete listing at https://bgp.nsrc.org/REN/URAN/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
786 197 1751 186 JANET Jisc Services Limited, GB
559 114 533 104 SWITCH Peering requests: peering at switch.c
8895 110 24 5 ISU Internet Services Unit ISU, SA
1103 96 1487 83 SURFNET-NL SURFnet, The Netherlands, NL
2614 94 26 73 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
Complete listing at https://bgp.nsrc.org/REN/URAN/data-ASnet-RIPE
LACNIC Region per AS prefix count summary
-----------------------------------------
ASN No of nets /20 equiv MaxAgg Description
1916 310 178 43 Rede Nacional de Ensino e Pesquisa, BR
28391 157 10 69 Universidad Juarez Autonoma de Tabasco, M
11340 109 25 52 Red Universitaria Nacional, CL
271640 67 8 1 UNIVERSIDADE FEDERAL DE VICOSA, BR
4270 53 16 1 Red de Interconexion Universitaria, AR
61468 53 5 17 CEDIA, EC
19611 48 17 2 Associacao Antonio Vieira - Unisinos, BR
2715 46 99 35 Fundacao Carlos Chagas Filho de Amparo a
3596 40 8 4 Universidad Autonoma Metropolitana, MX
28614 38 2 2 Fundacao Universidade Regional de Blumena
Complete listing at https://bgp.nsrc.org/REN/URAN/data-ASnet-LACNIC
AfriNIC Region per AS prefix count summary
------------------------------------------
ASN No of nets /20 equiv MaxAgg Description
36914 549 82 3 KENET-AS, KE
2018 380 319 71 TENET-1, ZA
8094 47 48 18 PUKNET, ZA
37215 34 8 1 MAREN, MW
6879 24 2 9 ENSTINET-, EG
30983 12 4 2 MARWAN-AS, MA
37661 12 8 4 NRaE1-AS, NG
37501 11 49 6 UOFS, ZA
327700 10 16 1 MoRENet, MZ
36982 8 33 8 UCT, ZA
Complete listing at https://bgp.nsrc.org/REN/URAN/data-ASnet-AFRINIC
Global Per AS prefix count summary
----------------------------------
ASN No of nets /20 equiv MaxAgg Description
2907 640 2170 465 SINET-AS Research Organization of Informa
36914 549 82 3 KENET-AS, KE
7497 452 180 24 CSTNET-AS-AP Computer Network Information
2018 380 319 71 TENET-1, ZA
1916 310 178 43 Rede Nacional de Ensino e Pesquisa, BR
680 284 1899 249 DFN Verein zur Foerderung eines Deutschen
376 201 162 151 RISQ-AS, CA
668 199 642 169 DNIC-AS-00668, US
5786 198 16 1 UPRENET, PR
786 197 1751 186 JANET Jisc Services Limited, GB
Complete listing at https://bgp.nsrc.org/REN/URAN/data-ASnet
Global Per AS Maximum Aggregation summary
-----------------------------------------
ASN No of nets Net Savings Description
36914 549 546 KENET-AS, KE
7497 452 428 CSTNET-AS-AP Computer Network Information Cente
2018 380 309 TENET-1, ZA
1916 310 267 Rede Nacional de Ensino e Pesquisa, BR
5786 198 197 UPRENET, PR
58647 183 181 KAGAWAU-AS Kagawa University, JP
2920 173 166 LACOE, US
18558 139 135 NETBLK-RCOEK, US
55824 146 126 NKN-CORE-NW NKN Core Network, IN
8895 110 105 ISU Internet Services Unit ISU, SA
Complete listing at https://bgp.nsrc.org/REN/URAN/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
Complete listing at https://bgp.nsrc.org/REN/URAN/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/URAN/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 /11:1 /12:10
/13:18 /14:35 /15:115 /16:1985 /17:414 /18:451
/19:569 /20:831 /21:871 /22:1393 /23:1493 /24:10575
/25:54 /26:75 /27:35 /28:10 /29:13 /30:10
/31:0 /32:3
Advertised prefixes smaller than registry allocations
-----------------------------------------------------
ASN No of nets Total ann. Description
36914 525 549 KENET-AS, KE
8895 107 110 ISU Internet Services Unit ISU, SA
1916 74 310 Rede Nacional de Ensino e Pesquisa, BR
23024 36 97 OCDE, US
32440 33 58 LONI, US
28614 32 38 Fundacao Universidade Regional de Blumenau, BR
46115 32 35 LUTHER, US
25977 30 44 HCCS, US
27609 29 45 USC-UNIVERSITY-HOSPITAL, US
40326 29 33 ECKERD-COLLEGE, US
Complete listing at https://bgp.nsrc.org/REN/URAN/data-sXXas-nos
Number of /24s announced per /8 block (Global)
----------------------------------------------
1:2 5:15 6:4 8:2 12:1 14:93
23:8 24:2 31:1 35:9 37:8 38:10
40:1 41:218 42:10 44:4 45:42 46:4
47:1 49:12 50:2 52:1 59:19 60:6
61:3 62:6 63:32 64:44 65:5 66:34
67:39 68:10 69:17 70:2 71:1 72:8
74:53 76:34 77:6 78:3 79:10 80:10
81:23 82:3 83:7 84:7 85:31 87:1
89:10 91:41 93:14 94:2 95:2 96:5
97:1 98:2 102:10 103:367 104:80 108:8
109:5 111:21 113:1 114:24 116:7 117:61
118:32 119:30 121:27 122:8 123:8 124:42
125:3 128:57 129:38 130:95 131:64 132:66
133:157 134:110 136:199 137:51 138:58 139:11
140:33 141:3 142:42 143:25 144:26 145:2
146:136 147:52 148:198 149:12 150:69 151:11
152:129 153:14 154:45 155:63 156:135 157:26
158:30 159:117 160:34 161:19 162:22 163:64
164:11 165:48 167:10 168:119 169:7 170:94
172:2 173:6 175:16 177:6 179:13 180:16
181:1 182:12 184:6 185:41 186:3 187:24
188:12 189:3 190:33 191:13 192:1419 193:262
194:105 195:77 196:147 197:336 198:464 199:279
200:332 201:36 202:636 203:432 204:372 205:136
206:211 207:224 208:62 209:115 210:223 211:3
212:144 213:4 214:8 216:91 217:12 218:22
219:6 220:16 222:2 223:15
End of report
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