[REN-BGP-stats-all] IPv4 R&E Routing Table Report - Internet2 (R&E) view
REN Routing Table Report
cscora at bgp.nsrc.org
Sun Feb 9 22:00:48 UTC 2025
IPv4 R&E Routing Table Report 22:00 GMT Sun 09 Feb, 2025
IPv4 BGP Table (R&E) as seen at Internet2.
Report Website: https://bgp.nsrc.org/REN
Detailed Analysis: https://bgp.nsrc.org/REN/Internet2/
Analysis Summary
----------------
BGP routing table entries examined: 25016
Prefixes after maximum aggregation (per Origin AS): 13648
Deaggregation factor: 1.83
Unique aggregates announced (without unneeded subnets): 15982
Number of IPv4 prefixes with a valid ROA: 12810
Number of IPv4 prefixes with an invalid ROA: 20
Number of IPv4 prefixes with no ROA: 12186
Total ASes present in the Internet Routing Table: 2807
Prefixes per ASN: 8.91
Origin-only ASes present in the Internet Routing Table: 2425
Origin ASes announcing only one prefix: 1086
Transit ASes present in the Internet Routing Table: 382
Transit-only ASes present in the Internet Routing Table: 70
Paths with bogon ASNs present in the IPv4 Routing Table: 0
Average AS path length visible in the Internet Routing Table: 3.4
Max AS path length visible: 19
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: 46100
Number of 32-bit ASNs visible in the Routing Table: 674
Prefixes from 32-bit ASNs in the Routing Table: 1772
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: 9
Number of addresses announced to Internet: 241926096
Equivalent to 14 /8s, 107 /16s and 127 /24s
Percentage of available address space announced: 6.5
Percentage of allocated address space announced: 6.5
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: 3523
APNIC Region Analysis Summary
-----------------------------
Prefixes being announced by APNIC Region ASes: 4716
Total APNIC prefixes after maximum aggregation: 2265
APNIC Deaggregation factor: 2.08
Prefixes being announced from the APNIC address blocks: 4836
Unique aggregates announced from the APNIC address blocks: 2755
APNIC Region origin ASes present in the Internet Routing Table: 564
APNIC Prefixes per ASN: 8.57
APNIC Region origin ASes announcing only one prefix: 240
APNIC Region transit ASes present in the Internet Routing Table: 57
Average APNIC Region AS path length visible: 3.9
Max APNIC Region AS path length visible: 13
Number of APNIC region 32-bit ASNs visible in the Routing Table: 211
Number of APNIC addresses announced to Internet: 45599040
Equivalent to 2 /8s, 183 /16s and 201 /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, 131072-153913
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: 13965
Total ARIN prefixes after maximum aggregation: 7753
ARIN Deaggregation factor: 1.80
Prefixes being announced from the ARIN address blocks: 13676
Unique aggregates announced from the ARIN address blocks: 9088
ARIN Region origin ASes present in the Internet Routing Table: 1293
ARIN Prefixes per ASN: 10.58
ARIN Region origin ASes announcing only one prefix: 457
ARIN Region transit ASes present in the Internet Routing Table: 163
Average ARIN Region AS path length visible: 3.1
Max ARIN Region AS path length visible: 15
Number of ARIN region 32-bit ASNs visible in the Routing Table: 212
Number of ARIN addresses announced to Internet: 131008720
Equivalent to 7 /8s, 207 /16s and 8 /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: 3669
Total RIPE prefixes after maximum aggregation: 2916
RIPE Deaggregation factor: 1.26
Prefixes being announced from the RIPE address blocks: 3822
Unique aggregates announced from the RIPE address blocks: 3199
RIPE Region origin ASes present in the Internet Routing Table: 668
RIPE Prefixes per ASN: 5.72
RIPE Region origin ASes announcing only one prefix: 300
RIPE Region transit ASes present in the Internet Routing Table: 108
Average RIPE Region AS path length visible: 3.7
Max RIPE Region AS path length visible: 13
Number of RIPE region 32-bit ASNs visible in the Routing Table: 156
Number of RIPE addresses announced to Internet: 58647936
Equivalent to 3 /8s, 126 /16s and 229 /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: 1487
Total LACNIC prefixes after maximum aggregation: 541
LACNIC Deaggregation factor: 2.75
Prefixes being announced from the LACNIC address blocks: 1494
Unique aggregates announced from the LACNIC address blocks: 712
LACNIC Region origin ASes present in the Internet Routing Table: 156
LACNIC Prefixes per ASN: 9.58
LACNIC Region origin ASes announcing only one prefix: 56
LACNIC Region transit ASes present in the Internet Routing Table: 23
Average LACNIC Region AS path length visible: 4.1
Max LACNIC Region AS path length visible: 13
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 64
Number of LACNIC addresses announced to Internet: 4205376
Equivalent to 0 /8s, 64 /16s and 43 /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: 1178
Total AfriNIC prefixes after maximum aggregation: 172
AfriNIC Deaggregation factor: 6.85
Prefixes being announced from the AfriNIC address blocks: 1179
Unique aggregates announced from the AfriNIC address blocks: 219
AfriNIC Region origin ASes present in the Internet Routing Table: 55
AfriNIC Prefixes per ASN: 21.44
AfriNIC Region origin ASes announcing only one prefix: 33
AfriNIC Region transit ASes present in the Internet Routing Table: 11
Average AfriNIC Region AS path length visible: 3.9
Max AfriNIC Region AS path length visible: 19
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 31
Number of AfriNIC addresses announced to Internet: 2460928
Equivalent to 0 /8s, 37 /16s and 141 /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 637 2202 464 SINET-AS Research Organization of Informa
7497 450 180 24 CSTNET-AS-AP Computer Network Information
1237 194 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 147 19 21 NKN-CORE-NW NKN Core Network, IN
4538 140 4192 71 ERX-CERNET-BKB China Education and Resear
4762 75 4 1 MAHIDOL-BORDER-AS Mahidol University, Tha
4621 69 37 10 UNINET-AS-AP UNINET-, TH
2697 59 4 34 ERX-ERNET-AS Education and Research Netwo
Complete listing at https://bgp.nsrc.org/REN/Internet2/data-ASnet-APNIC
ARIN Region per AS prefix count summary
---------------------------------------
ASN No of nets /20 equiv MaxAgg Description
16509 4084 4947 1967 AMAZON-02, US
14618 1012 4445 772 AMAZON-AES, US
2152 424 507 98 CENIC-2152, US
2920 221 44 45 LACOE, US
668 210 647 178 DNIC-AS-00668, US
376 202 162 151 RISQ-AS, CA
5786 198 16 1 UPRENET, PR
18558 140 18 5 NETBLK-RCOEK, US
81 129 519 34 NCREN, US
1 128 2 49 LVLT-1, US
Complete listing at https://bgp.nsrc.org/REN/Internet2/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
786 208 1767 183 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 98 1743 84 SURFNET-NL SURFnet, The Netherlands, NL
2614 93 26 73 ROEDUNET, RO
8987 86 243 62 AMAZON EXPANSION, IE
137 80 676 76 ASGARR Consortium GARR, IT
1930 79 88 74 RCCN Fundacao para a Ciencia e a Tecnolog
553 78 462 78 BELWUE BelWue-Koordination, DE
Complete listing at https://bgp.nsrc.org/REN/Internet2/data-ASnet-RIPE
LACNIC Region per AS prefix count summary
-----------------------------------------
ASN No of nets /20 equiv MaxAgg Description
1916 311 178 44 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
4270 52 16 1 Red de Interconexion Universitaria, AR
61468 52 5 17 CEDIA, EC
2715 49 99 35 Fundacao Carlos Chagas Filho de Amparo a
19611 48 17 2 Associacao Antonio Vieira - Unisinos, BR
3596 40 8 4 Universidad Autonoma Metropolitana, MX
28614 38 2 2 Fundacao Universidade Regional de Blumena
1251 37 31 26 FUNDACAO DE AMPARO A PESQUISA DO ESTADO S
Complete listing at https://bgp.nsrc.org/REN/Internet2/data-ASnet-LACNIC
AfriNIC Region per AS prefix count summary
------------------------------------------
ASN No of nets /20 equiv MaxAgg Description
36914 552 82 3 KENET-AS, KE
2018 379 319 71 TENET-1, ZA
8094 37 36 13 PUKNET, ZA
37182 36 8 1 TERNET, TZ
37215 34 8 1 MAREN, MW
6879 24 2 9 ENSTINET-, EG
37661 12 8 4 NRaE1-AS, NG
37501 11 49 6 UOFS, ZA
327700 11 16 1 MoRENet, MZ
36982 8 33 8 UCT, ZA
Complete listing at https://bgp.nsrc.org/REN/Internet2/data-ASnet-AFRINIC
Global Per AS prefix count summary
----------------------------------
ASN No of nets /20 equiv MaxAgg Description
16509 4084 4947 1967 AMAZON-02, US
14618 1012 4445 772 AMAZON-AES, US
2907 637 2202 464 SINET-AS Research Organization of Informa
36914 552 82 3 KENET-AS, KE
7497 450 180 24 CSTNET-AS-AP Computer Network Information
2152 424 507 98 CENIC-2152, US
2018 379 319 71 TENET-1, ZA
1916 311 178 44 Rede Nacional de Ensino e Pesquisa, BR
680 284 1899 249 DFN Verein zur Foerderung eines Deutschen
2920 221 44 45 LACOE, US
Complete listing at https://bgp.nsrc.org/REN/Internet2/data-ASnet
Global Per AS Maximum Aggregation summary
-----------------------------------------
ASN No of nets Net Savings Description
36914 552 549 KENET-AS, KE
7497 450 426 CSTNET-AS-AP Computer Network Information Cente
2152 424 326 CENIC-2152, US
2018 379 308 TENET-1, ZA
1916 311 267 Rede Nacional de Ensino e Pesquisa, BR
14618 1012 240 AMAZON-AES, US
5786 198 197 UPRENET, PR
58647 183 181 KAGAWAU-AS Kagawa University, JP
2920 221 176 LACOE, US
2907 637 173 SINET-AS Research Organization of Information a
Complete listing at https://bgp.nsrc.org/REN/Internet2/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/Internet2/data-badAS
Advertised Unallocated Addresses
--------------------------------
Unassigned Network ASN Information AS Name
64.186.3.0/24 Origin: 16509 AMAZON-02, US
64.186.3.0/24 Transit: 11537 INTERNET2-RESEARCH-EDU, US
103.165.160.0/24 Origin: 16509 AMAZON-02, US
103.165.160.0/24 Transit: 11537 INTERNET2-RESEARCH-EDU, US
164.160.192.0/21 Origin: 37661 NRaE1-AS, NG
164.160.192.0/21 Transit: 37288 WACREN, SN
192.225.212.0/24 Origin: 14618 AMAZON-AES, US
192.225.212.0/24 Transit: 16509 AMAZON-02, US
192.225.223.0/24 Origin: 14618 AMAZON-AES, US
192.225.223.0/24 Transit: 16509 AMAZON-02, US
Complete listing at https://bgp.nsrc.org/REN/Internet2/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 /11:3 /12:18
/13:28 /14:58 /15:174 /16:2063 /17:482 /18:506
/19:651 /20:1004 /21:1125 /22:1756 /23:1915 /24:14934
/25:48 /26:76 /27:100 /28:11 /29:59 /30:0
/31:0 /32:3
Advertised prefixes smaller than registry allocations
-----------------------------------------------------
ASN No of nets Total ann. Description
16509 670 4084 AMAZON-02, US
36914 528 552 KENET-AS, KE
14618 321 1012 AMAZON-AES, US
8895 107 110 ISU Internet Services Unit ISU, SA
1916 75 311 Rede Nacional de Ensino e Pesquisa, BR
2152 53 424 CENIC-2152, US
1 42 128 LVLT-1, US
23024 36 97 OCDE, US
37182 35 36 TERNET, TZ
3267 34 78 NIKS, RU
Complete listing at https://bgp.nsrc.org/REN/Internet2/data-sXXas-nos
Number of /24s announced per /8 block (Global)
----------------------------------------------
1:3 3:176 4:2 5:20 6:4 8:2
12:1 13:52 14:93 15:103 16:129 18:158
23:52 24:3 31:3 35:47 38:11 40:6
41:255 42:11 44:4 45:78 46:9 47:1
49:11 50:11 52:830 54:178 57:2 58:1
59:19 60:6 61:3 62:8 63:38 64:147
65:26 66:98 67:68 68:27 69:58 70:21
71:15 72:19 74:81 75:1 76:46 77:12
78:3 79:10 80:14 81:25 82:8 83:9
84:11 85:55 86:5 87:2 88:1 89:18
91:51 92:4 93:39 94:2 95:2 96:7
97:1 98:14 99:68 102:15 103:344 104:137
107:8 108:35 109:7 111:21 113:1 114:24
115:1 116:14 117:66 118:33 119:30 121:28
122:11 123:8 124:42 125:5 128:58 129:43
130:164 131:74 132:64 133:156 134:112 135:2
136:224 137:107 138:65 139:19 140:47 141:13
142:61 143:33 144:40 145:4 146:139 147:71
148:209 149:20 150:72 151:39 152:142 153:14
154:45 155:105 156:133 157:41 158:41 159:172
160:37 161:40 162:73 163:77 164:23 165:78
166:3 167:37 168:174 169:14 170:193 171:1
172:21 173:36 174:2 175:16 176:4 177:6
178:1 179:10 180:16 181:1 182:11 184:9
185:86 186:3 187:22 188:17 189:3 190:34
191:13 192:1605 193:332 194:128 195:78 196:147
197:337 198:609 199:348 200:270 201:37 202:660
203:458 204:423 205:197 206:247 207:307 208:132
209:201 210:221 211:3 212:153 213:19 214:9
216:219 217:14 218:23 219:6 220:16 222:2
223:15
End of report
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