[REN-BGP-stats-all] IPv4 R&E Routing Table Report - Internet2 (R&E) view
REN Routing Table Report
cscora at bgp.nsrc.org
Fri Feb 21 22:00:46 UTC 2025
IPv4 R&E Routing Table Report 22:00 GMT Fri 21 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: 25138
Prefixes after maximum aggregation (per Origin AS): 13678
Deaggregation factor: 1.84
Unique aggregates announced (without unneeded subnets): 16015
Number of IPv4 prefixes with a valid ROA: 12939
Number of IPv4 prefixes with an invalid ROA: 19
Number of IPv4 prefixes with no ROA: 12180
Total ASes present in the Internet Routing Table: 2828
Prefixes per ASN: 8.89
Origin-only ASes present in the Internet Routing Table: 2452
Origin ASes announcing only one prefix: 1091
Transit ASes present in the Internet Routing Table: 376
Transit-only ASes present in the Internet Routing Table: 67
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: 46157
Number of 32-bit ASNs visible in the Routing Table: 701
Prefixes from 32-bit ASNs in the Routing Table: 1904
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: 241648848
Equivalent to 14 /8s, 103 /16s and 68 /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: 3560
APNIC Region Analysis Summary
-----------------------------
Prefixes being announced by APNIC Region ASes: 4777
Total APNIC prefixes after maximum aggregation: 2301
APNIC Deaggregation factor: 2.08
Prefixes being announced from the APNIC address blocks: 4898
Unique aggregates announced from the APNIC address blocks: 2791
APNIC Region origin ASes present in the Internet Routing Table: 589
APNIC Prefixes per ASN: 8.32
APNIC Region origin ASes announcing only one prefix: 248
APNIC Region transit ASes present in the Internet Routing Table: 59
Average APNIC Region AS path length visible: 4.0
Max APNIC Region AS path length visible: 13
Number of APNIC region 32-bit ASNs visible in the Routing Table: 235
Number of APNIC addresses announced to Internet: 45683008
Equivalent to 2 /8s, 185 /16s and 17 /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: 13893
Total ARIN prefixes after maximum aggregation: 7715
ARIN Deaggregation factor: 1.80
Prefixes being announced from the ARIN address blocks: 13603
Unique aggregates announced from the ARIN address blocks: 9049
ARIN Region origin ASes present in the Internet Routing Table: 1301
ARIN Prefixes per ASN: 10.46
ARIN Region origin ASes announcing only one prefix: 462
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: 217
Number of ARIN addresses announced to Internet: 131099472
Equivalent to 7 /8s, 208 /16s and 107 /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: 3723
Total RIPE prefixes after maximum aggregation: 2944
RIPE Deaggregation factor: 1.26
Prefixes being announced from the RIPE address blocks: 3876
Unique aggregates announced from the RIPE address blocks: 3224
RIPE Region origin ASes present in the Internet Routing Table: 660
RIPE Prefixes per ASN: 5.87
RIPE Region origin ASes announcing only one prefix: 294
RIPE Region transit ASes present in the Internet Routing Table: 104
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: 153
Number of RIPE addresses announced to Internet: 58181632
Equivalent to 3 /8s, 119 /16s and 200 /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: 1553
Total LACNIC prefixes after maximum aggregation: 542
LACNIC Deaggregation factor: 2.87
Prefixes being announced from the LACNIC address blocks: 1560
Unique aggregates announced from the LACNIC address blocks: 716
LACNIC Region origin ASes present in the Internet Routing Table: 157
LACNIC Prefixes per ASN: 9.94
LACNIC Region origin ASes announcing only one prefix: 56
LACNIC Region transit ASes present in the Internet Routing Table: 22
Average LACNIC Region AS path length visible: 4.0
Max LACNIC Region AS path length visible: 13
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 65
Number of LACNIC addresses announced to Internet: 4238912
Equivalent to 0 /8s, 64 /16s and 174 /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: 1191
Total AfriNIC prefixes after maximum aggregation: 175
AfriNIC Deaggregation factor: 6.81
Prefixes being announced from the AfriNIC address blocks: 1192
Unique aggregates announced from the AfriNIC address blocks: 226
AfriNIC Region origin ASes present in the Internet Routing Table: 53
AfriNIC Prefixes per ASN: 22.49
AfriNIC Region origin ASes announcing only one prefix: 31
AfriNIC Region transit ASes present in the Internet Routing Table: 10
Average AfriNIC Region AS path length visible: 3.8
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: 2441728
Equivalent to 0 /8s, 37 /16s and 66 /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 634 2170 465 SINET-AS Research Organization of Informa
7497 451 180 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 174 297 117 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
23570 59 5 11 INCHEON-AS-KR UNIVERSITY OF INCHEON, KR
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 4070 4946 1954 AMAZON-02, US
14618 1017 4445 776 AMAZON-AES, US
2152 409 507 98 CENIC-2152, US
2920 221 44 45 LACOE, US
668 212 648 179 DNIC-AS-00668, US
376 202 162 151 RISQ-AS, CA
5786 197 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
786 194 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 98 1743 84 SURFNET-NL SURFnet, The Netherlands, NL
2614 94 26 73 ROEDUNET, RO
8987 87 243 63 AMAZON EXPANSION, IE
31638 86 12 44 ASN-LEPIDA, IT
137 82 677 77 ASGARR Consortium GARR, IT
1930 79 88 74 RCCN Fundacao para a Ciencia e a Tecnolog
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
271640 67 8 1 UNIVERSIDADE FEDERAL DE VICOSA, BR
4270 53 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
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 558 82 3 KENET-AS, KE
2018 380 319 71 TENET-1, ZA
8094 47 48 18 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 4070 4946 1954 AMAZON-02, US
14618 1017 4445 776 AMAZON-AES, US
2907 634 2170 465 SINET-AS Research Organization of Informa
36914 558 82 3 KENET-AS, KE
7497 451 180 24 CSTNET-AS-AP Computer Network Information
2152 409 507 98 CENIC-2152, US
2018 380 319 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 558 555 KENET-AS, KE
7497 451 427 CSTNET-AS-AP Computer Network Information Cente
2152 409 311 CENIC-2152, US
2018 380 309 TENET-1, ZA
1916 311 267 Rede Nacional de Ensino e Pesquisa, BR
14618 1017 241 AMAZON-AES, US
5786 197 196 UPRENET, PR
58647 183 181 KAGAWAU-AS Kagawa University, JP
2920 221 176 LACOE, US
2907 634 169 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 /15:171 /16:2064 /17:486 /18:504
/19:645 /20:1010 /21:1133 /22:1777 /23:1909 /24:15036
/25:49 /26:74 /27:98 /28:11 /29:59 /30:0
/31:0 /32:3
Advertised prefixes smaller than registry allocations
-----------------------------------------------------
ASN No of nets Total ann. Description
16509 664 4070 AMAZON-02, US
36914 534 558 KENET-AS, KE
14618 319 1017 AMAZON-AES, US
8895 107 110 ISU Internet Services Unit ISU, SA
1916 74 311 Rede Nacional de Ensino e Pesquisa, BR
31638 64 86 ASN-LEPIDA, IT
2152 45 409 CENIC-2152, US
1 42 128 LVLT-1, US
23024 36 97 OCDE, US
3267 35 79 NIKS, RU
Complete listing at https://bgp.nsrc.org/REN/Internet2/data-sXXas-nos
Number of /24s announced per /8 block (Global)
----------------------------------------------
1:3 3:174 4:2 5:21 6:4 8:2
12:1 13:54 14:93 15:103 16:132 18:158
23:54 24:3 31:3 35:54 37:8 38:11
40:6 41:258 42:11 44:4 45:79 46:9
47:1 49:11 50:11 52:828 54:172 57:2
58:1 59:19 60:6 61:3 62:7 63:38
64:145 65:26 66:98 67:68 68:25 69:56
70:21 71:13 72:19 74:82 75:1 76:43
77:13 78:3 79:10 80:13 81:24 82:7
83:9 84:11 85:55 86:8 87:2 88:1
89:24 91:51 92:4 93:48 94:3 95:2
96:7 97:1 98:14 99:68 102:15 103:385
104:137 107:8 108:35 109:7 111:21 113:1
114:24 115:1 116:14 117:66 118:33 119:30
121:28 122:10 123:8 124:42 125:5 128:58
129:41 130:164 131:71 132:64 133:156 134:109
135:2 136:224 137:107 138:65 139:20 140:47
141:13 142:61 143:33 144:39 145:4 146:139
147:43 148:209 149:20 150:72 151:39 152:146
153:14 154:45 155:104 156:133 157:38 158:40
159:174 160:37 161:40 162:73 163:78 164:23
165:77 166:3 167:37 168:174 169:14 170:194
171:1 172:22 173:35 174:2 175:16 176:5
177:5 178:1 179:14 180:16 181:1 182:11
184:9 185:87 186:3 187:22 188:21 189:3
190:33 191:13 192:1608 193:325 194:128 195:79
196:149 197:340 198:610 199:355 200:336 201:37
202:657 203:457 204:420 205:197 206:251 207:307
208:134 209:193 210:223 211:3 212:153 213:17
214:9 216:217 217:14 218:23 219:6 220:16
222:2 223:15
End of report
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