Autonomous Systems are networks typically governed by large ISPs that participate in global Internet routing. Each network is assigned a unique identification number known as the AS number or ASN by the Internet Assigned Numbers Authority.
1,838,592 IP addresses
Details
| IPv4 addresses | 1,838,592 |
|---|---|
| IPv6 /64 networks | 232 |
| Prefixes | 15 |
Other ASN allocated to SURFnet bv
| ASN | Name | IP addresses |
|---|---|---|
| 1103 | SURFNET-NL | 6,270,464 |
| 1128 | TUDELFT-NL | 196,608 |
| 1161 | AS-TUE | 70,656 |
| 1199 | ABUSEHUB-AS SURFnet | 65,536 |
| 1125 | UNSPECIFIED | 65,536 |
| 1133 | UTWENTE-AS | 65,536 |
| 1147 | MCL-AS | 32,768 |
| 1145 | Kennisnet-AS | 4,096 |
| 1142 | WKAPNET | 3,072 |
| 1149 | SURFNET-AS SURFnet BV | 768 |
| 1132 | METEOGROUP-AS | 768 |
| 1102 | SMEERBOEL-AS | 768 |
| 1146 | OS3-AS | 256 |
| 1150 | SURFNET-AS | 0 |
Prefixes for AS1101
IPv4 addresses
| Network | Location | Addresses | |
|---|---|---|---|
| 145.102.4.0/23 | SURFnet bv |  Utrecht (Geuzenwijk) |
512 |
| 145.192.0.0/12 | SURFnet III a | Utrecht (Oost) |
1,048,576 |
| 145.208.0.0/13 | SURFnet III b | Utrecht (Oost) |
524,288 |
| 145.216.0.0/15 | SURFnet III c | Utrecht (Oost) |
131,072 |
| 145.220.0.0/16 | SURFnet III d | Utrecht (Oost) |
65,536 |
| 145.99.0.0/16 | Surfnet Various | Utrecht (Geuzenwijk) |
65,536 |
| 185.100.59.0/24 | In use by public IRC server the Eris Free Network | Hilversum |
256 |
| 192.12.54.0/24 | Ip-Eend | Utrecht (Geuzenwijk) |
256 |
| 192.150.94.0/24 | Ip-Eend | Utrecht (Geuzenwijk) |
256 |
| 192.16.200.0/24 | SURFnet bv | Utrecht (Geuzenwijk) |
256 |
| 192.42.116.0/22 | SURFnet bv | Amsterdam (Amsterdam-Centrum) |
1,024 |
| 192.42.128.0/22 | SURFnet bv | Utrecht (Geuzenwijk) |
1,024 |
IPv6 addresses - showing the first 2 of 3 networks
| Network | Location | /64 Prefixes | |
|---|---|---|---|
| 2001:67c:12d8::/48 | In use by public IRC server the Eris Free Network | Hilversum |
216 |
| 2001:67c:6ec::/48 | SURFnet bv | Utrecht (Oost) |
216 |