Spoofing Information for AS 1103 (SURFNET-NL)
Spoofing status per IP block for last year of data
(Results for all dates also available.)| Spoof status key | ||||
|---|---|---|---|---|
| received | Spoofed packet was received. | ✔ | Pattern of tests from this IP block indicates a switch from allowing spoofing to blocking it. | |
| rewritten | Spoofed packet was received, but the source address was changed en route. | |||
| blocked | Spoofed packet was not received, but unspoofed packet was. | |||
| unknown | Neither spoofed nor unspoofed packet was received. | |||
| IP block | Latest test | Spoof Private | Spoof Routable | ||
|---|---|---|---|---|---|
| 145.102.242.x/24 | 2025-11-18 07:51:04 GMT | blocked | blocked | ||
| 145.103.114.x/24 | 2026-01-12 12:06:18 GMT | blocked | blocked | ||
| 145.103.249.x/24 | 2026-02-05 09:36:17 GMT | rewritten | rewritten | ||
| 145.126.25.x/24 | 2025-09-10 20:22:51 GMT | blocked | blocked | ||
| 145.126.26.x/24 | 2025-07-17 11:41:39 GMT | blocked | blocked | ||
| 145.126.27.x/24 | 2025-10-06 08:12:56 GMT | blocked | blocked | ||
| 145.126.28.x/24 | 2025-09-01 06:54:08 GMT | blocked | blocked | ||
| 145.126.29.x/24 | 2025-07-29 13:31:08 GMT | blocked | blocked | ||
| 145.126.31.x/24 | 2025-07-21 08:17:00 GMT | blocked | blocked | ||
| 145.126.99.x/24 | 2025-08-21 11:29:28 GMT | blocked | blocked | ||
| 2001:610:1xx::/40 | 2025-11-07 15:03:53 GMT | blocked | blocked | ||
Address Space Announcement History
The customer cone for 1103 is too large for a prefix list to be useful.