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 | ||
---|---|---|---|---|---|
37.160.33.x/24 | 2016-08-28 07:20:55 GMT | rewritten | rewritten | ||
37.160.76.x/24 | 2019-06-27 21:29:53 GMT | rewritten | rewritten | ||
37.160.106.x/24 | 2016-10-09 18:35:44 GMT | rewritten | rewritten | ||
37.160.148.x/24 | 2017-01-11 22:22:21 GMT | rewritten | rewritten | ||
37.161.112.x/24 | 2016-09-11 13:43:40 GMT | rewritten | rewritten | ||
37.161.188.x/24 | 2016-08-25 08:22:36 GMT | rewritten | rewritten | ||
37.162.21.x/24 | 2018-10-24 16:55:02 GMT | rewritten | rewritten | ||
37.162.77.x/24 | 2016-09-01 15:17:18 GMT | rewritten | rewritten | ||
37.162.226.x/24 | 2017-05-04 16:22:36 GMT | rewritten | rewritten | ||
37.163.44.x/24 | 2016-08-05 15:30:39 GMT | rewritten | rewritten | ||
37.163.112.x/24 | 2016-08-15 10:40:42 GMT | rewritten | rewritten | ||
37.163.193.x/24 | 2016-08-20 19:32:24 GMT | rewritten | rewritten | ||
37.163.238.x/24 | 2020-02-06 19:32:06 GMT | rewritten | rewritten | ||
37.164.14.x/24 | 2019-09-09 18:42:03 GMT | rewritten | rewritten | ||
37.164.29.x/24 | 2021-03-18 08:30:37 GMT | blocked | blocked | ||
37.164.100.x/24 | 2019-10-06 21:54:19 GMT | rewritten | rewritten | ||
37.164.104.x/24 | 2018-12-21 18:22:26 GMT | rewritten | rewritten | ||
37.164.135.x/24 | 2019-05-27 20:42:58 GMT | blocked | blocked | ||
37.164.153.x/24 | 2021-03-14 18:32:52 GMT | blocked | blocked | ||
37.164.178.x/24 | 2022-03-11 09:44:51 GMT | blocked | blocked | ||
37.164.187.x/24 | 2019-09-23 21:42:06 GMT | rewritten | rewritten | ||
37.164.194.x/24 | 2016-10-02 17:22:37 GMT | rewritten | rewritten | ||
37.164.213.x/24 | 2018-10-08 12:50:56 GMT | rewritten | rewritten | ||
37.164.253.x/24 | 2019-04-22 13:03:31 GMT | blocked | blocked | ||
37.165.2.x/24 | 2019-07-03 15:31:23 GMT | blocked | blocked | ||
37.165.57.x/24 | 2018-11-06 09:54:04 GMT | rewritten | rewritten | ||
37.165.88.x/24 | 2019-04-19 19:11:40 GMT | rewritten | rewritten | ||
37.165.138.x/24 | 2023-09-17 06:32:48 GMT | rewritten | rewritten | ||
37.165.139.x/24 | 2019-01-08 13:15:07 GMT | rewritten | rewritten | ||
37.165.175.x/24 | 2018-12-01 15:53:07 GMT | rewritten | rewritten | ||
37.165.177.x/24 | 2016-12-05 10:24:03 GMT | rewritten | rewritten | ||
37.165.191.x/24 | 2023-11-04 00:14:03 GMT | rewritten | rewritten | ||
37.165.213.x/24 | 2023-12-02 11:19:29 GMT | rewritten | rewritten | ||
37.166.56.x/24 | 2023-09-29 22:54:02 GMT | rewritten | rewritten | ||
37.166.71.x/24 | 2023-10-12 18:58:01 GMT | blocked | blocked | ||
37.166.73.x/24 | 2019-10-25 13:05:55 GMT | rewritten | rewritten | ||
37.166.76.x/24 | 2022-06-02 19:47:15 GMT | blocked | blocked | ||
37.166.91.x/24 | 2021-05-28 11:10:43 GMT | blocked | blocked | ||
37.166.96.x/24 | 2022-11-09 15:33:38 GMT | rewritten | rewritten | ||
37.166.132.x/24 | 2023-12-24 19:24:53 GMT | rewritten | rewritten | ||
37.166.146.x/24 | 2019-09-10 12:24:54 GMT | blocked | blocked | ||
37.166.164.x/24 | 2024-03-16 11:33:45 GMT | rewritten | rewritten | ||
37.166.227.x/24 | 2017-09-15 15:54:25 GMT | rewritten | rewritten | ||
37.166.245.x/24 | 2023-09-30 19:42:48 GMT | rewritten | rewritten | ||
37.167.10.x/24 | 2023-09-14 09:55:24 GMT | rewritten | rewritten | ||
37.167.35.x/24 | 2022-06-08 12:13:33 GMT | rewritten | rewritten | ||
37.167.203.x/24 | 2023-08-04 10:27:10 GMT | rewritten | rewritten | ||
37.168.9.x/24 | 2018-08-02 17:55:06 GMT | rewritten | rewritten | ||
37.168.25.x/24 | 2017-11-20 10:12:23 GMT | rewritten | rewritten | ||
37.168.27.x/24 | 2019-03-10 13:31:31 GMT | rewritten | rewritten | ||
37.168.34.x/24 | 2017-04-28 15:23:38 GMT | rewritten | rewritten | ||
37.168.48.x/24 | 2018-07-26 10:36:43 GMT | rewritten | rewritten | ||
37.168.93.x/24 | 2017-05-02 12:54:16 GMT | rewritten | rewritten | ||
37.168.132.x/24 | 2019-03-21 11:00:20 GMT | blocked | blocked | ||
37.168.145.x/24 | 2019-02-08 16:15:29 GMT | rewritten | rewritten | ||
37.168.167.x/24 | 2018-06-11 11:10:51 GMT | rewritten | rewritten | ||
37.168.194.x/24 | 2017-09-27 14:49:22 GMT | rewritten | rewritten | ||
37.168.211.x/24 | 2018-11-21 16:31:38 GMT | rewritten | rewritten | ||
37.168.236.x/24 | 2019-03-13 15:53:55 GMT | blocked | blocked | ||
37.168.240.x/24 | 2018-01-30 11:27:07 GMT | rewritten | rewritten | ||
37.168.253.x/24 | 2018-07-30 12:10:21 GMT | rewritten | rewritten | ||
37.169.99.x/24 | 2017-08-14 14:40:04 GMT | rewritten | rewritten | ||
37.169.119.x/24 | 2018-06-01 15:28:51 GMT | rewritten | rewritten | ||
37.169.145.x/24 | 2018-06-10 12:24:45 GMT | rewritten | rewritten | ||
37.169.162.x/24 | 2024-01-27 10:48:48 GMT | rewritten | rewritten | ||
37.169.167.x/24 | 2017-12-17 18:14:15 GMT | rewritten | rewritten | ||
37.169.186.x/24 | 2017-08-14 17:22:06 GMT | rewritten | rewritten | ||
37.169.191.x/24 | 2023-12-01 20:04:10 GMT | blocked | blocked | ||
37.169.195.x/24 | 2018-03-16 18:57:44 GMT | rewritten | rewritten | ||
37.169.215.x/24 | 2018-05-17 11:29:48 GMT | rewritten | rewritten | ||
37.169.220.x/24 | 2018-06-02 10:21:40 GMT | rewritten | rewritten | ||
37.169.236.x/24 | 2018-06-28 10:21:14 GMT | rewritten | rewritten | ||
37.170.22.x/24 | 2019-10-16 09:57:48 GMT | rewritten | rewritten | ||
37.170.25.x/24 | 2017-10-05 15:06:10 GMT | rewritten | rewritten | ||
37.170.40.x/24 | 2017-12-03 12:03:34 GMT | rewritten | rewritten | ||
37.170.51.x/24 | 2017-10-17 13:52:13 GMT | rewritten | rewritten | ||
37.170.57.x/24 | 2019-03-22 08:26:04 GMT | blocked | blocked | ||
37.170.70.x/24 | 2023-08-25 21:00:29 GMT | rewritten | rewritten | ||
37.170.72.x/24 | 2018-05-25 21:54:37 GMT | blocked | blocked | ||
37.170.77.x/24 | 2018-07-31 08:19:34 GMT | rewritten | rewritten | ||
37.170.107.x/24 | 2018-09-02 09:51:02 GMT | rewritten | rewritten | ||
37.170.109.x/24 | 2022-11-14 20:05:30 GMT | blocked | blocked | ||
37.170.116.x/24 | 2019-05-16 22:04:00 GMT | blocked | blocked | ||
37.170.132.x/24 | 2018-01-31 17:11:29 GMT | rewritten | rewritten | ||
37.170.141.x/24 | 2018-05-10 02:17:59 GMT | rewritten | rewritten | ||
37.170.151.x/24 | 2019-01-31 16:50:58 GMT | rewritten | rewritten | ||
37.170.164.x/24 | 2017-12-20 11:48:59 GMT | rewritten | rewritten | ||
37.170.178.x/24 | 2023-01-11 19:20:02 GMT | blocked | blocked | ||
37.170.184.x/24 | 2017-10-25 08:53:48 GMT | rewritten | rewritten | ||
37.170.200.x/24 | 2018-04-18 20:10:17 GMT | rewritten | rewritten | ||
37.170.202.x/24 | 2019-09-09 16:15:50 GMT | blocked | blocked | ||
37.170.205.x/24 | 2017-12-21 15:56:12 GMT | rewritten | rewritten | ||
37.170.226.x/24 | 2018-07-06 13:17:31 GMT | rewritten | rewritten | ||
37.170.251.x/24 | 2018-05-17 09:15:29 GMT | rewritten | rewritten | ||
37.171.36.x/24 | 2018-06-20 16:38:21 GMT | rewritten | rewritten | ||
37.171.40.x/24 | 2017-12-18 20:25:21 GMT | rewritten | rewritten | ||
37.171.49.x/24 | 2018-12-16 14:56:53 GMT | rewritten | rewritten | ||
37.171.57.x/24 | 2018-10-12 13:17:59 GMT | rewritten | rewritten | ||
37.171.64.x/24 | 2017-12-07 16:24:27 GMT | rewritten | rewritten | ||
37.171.85.x/24 | 2021-10-14 11:41:41 GMT | blocked | blocked | ||
37.171.90.x/24 | 2017-08-15 12:01:04 GMT | rewritten | rewritten | ||
37.171.94.x/24 | 2017-12-10 13:10:26 GMT | rewritten | rewritten | ||
37.171.98.x/24 | 2019-11-07 14:53:56 GMT | blocked | blocked | ||
37.171.104.x/24 | 2017-08-22 16:21:00 GMT | rewritten | rewritten | ||
37.171.107.x/24 | 2023-08-26 15:39:20 GMT | rewritten | rewritten | ||
37.171.112.x/24 | 2018-10-04 10:59:30 GMT | rewritten | rewritten | ||
37.171.137.x/24 | 2022-05-27 17:31:42 GMT | blocked | blocked | ||
37.171.156.x/24 | 2017-12-20 20:18:35 GMT | rewritten | rewritten | ||
37.171.168.x/24 | 2017-10-12 14:19:13 GMT | rewritten | rewritten | ||
37.171.176.x/24 | 2018-05-22 09:04:44 GMT | rewritten | rewritten | ||
37.171.183.x/24 | 2017-04-30 17:10:55 GMT | rewritten | rewritten | ||
37.171.188.x/24 | 2018-09-12 12:08:15 GMT | blocked | blocked | ||
37.171.190.x/24 | 2017-10-02 09:27:09 GMT | rewritten | rewritten | ||
37.171.195.x/24 | 2017-05-15 11:47:12 GMT | rewritten | rewritten | ||
37.171.202.x/24 | 2018-07-30 15:54:09 GMT | blocked | blocked | ||
37.171.221.x/24 | 2018-01-08 08:54:44 GMT | rewritten | rewritten | ||
37.171.250.x/24 | 2018-06-04 09:57:20 GMT | rewritten | rewritten | ||
37.171.253.x/24 | 2018-08-31 08:35:39 GMT | rewritten | rewritten | ||
37.172.20.x/24 | 2018-01-22 13:53:24 GMT | rewritten | rewritten | ||
37.172.56.x/24 | 2018-01-02 18:08:35 GMT | rewritten | rewritten | ||
37.172.100.x/24 | 2017-09-13 17:16:23 GMT | rewritten | rewritten | ||
37.172.114.x/24 | 2017-11-29 14:09:51 GMT | rewritten | rewritten | ||
37.172.173.x/24 | 2017-12-02 18:37:55 GMT | rewritten | rewritten | ||
37.172.182.x/24 | 2017-11-09 06:26:18 GMT | rewritten | rewritten | ||
37.172.208.x/24 | 2021-06-21 18:59:41 GMT | blocked | blocked | ||
37.173.29.x/24 | 2019-05-17 20:06:36 GMT | blocked | blocked | ||
37.173.49.x/24 | 2019-02-23 09:05:28 GMT | blocked | blocked | ||
37.173.63.x/24 | 2019-06-07 23:55:40 GMT | blocked | blocked | ||
37.173.65.x/24 | 2018-07-14 07:30:39 GMT | rewritten | rewritten | ||
37.173.81.x/24 | 2020-10-31 19:36:53 GMT | blocked | blocked | ||
37.173.103.x/24 | 2018-07-26 14:44:34 GMT | blocked | blocked | ||
37.173.108.x/24 | 2018-12-09 13:50:24 GMT | rewritten | rewritten | ||
37.173.149.x/24 | 2018-05-05 08:00:26 GMT | rewritten | rewritten | ||
37.173.161.x/24 | 2019-04-01 07:18:04 GMT | blocked | blocked | ||
37.173.193.x/24 | 2019-03-22 10:49:00 GMT | blocked | blocked | ||
37.173.216.x/24 | 2020-09-25 08:15:27 GMT | blocked | blocked | ||
37.173.229.x/24 | 2018-05-02 20:59:17 GMT | rewritten | rewritten | ||
37.173.237.x/24 | 2018-06-26 16:52:16 GMT | rewritten | rewritten | ||
37.173.243.x/24 | 2018-09-04 14:31:12 GMT | blocked | blocked | ||
37.174.167.x/24 | 2024-01-13 07:57:26 GMT | blocked | blocked | ||
37.174.222.x/24 | 2023-11-17 13:59:08 GMT | rewritten | rewritten | ||
37.174.254.x/24 | 2023-12-31 20:31:18 GMT | rewritten | rewritten | ||
78.240.76.x/24 | 2023-11-17 07:51:36 GMT | rewritten | rewritten | ||
78.240.131.x/24 | 2023-08-27 18:14:46 GMT | rewritten | rewritten | ||
78.240.163.x/24 | 2023-08-21 19:43:24 GMT | rewritten | rewritten | ||
78.241.141.x/24 | 2024-04-08 18:55:15 GMT | blocked | blocked | ||
78.242.225.x/24 | 2023-08-26 12:08:51 GMT | rewritten | rewritten | ||
78.243.102.x/24 | 2024-03-09 10:27:18 GMT | rewritten | rewritten | ||
78.243.103.x/24 | 2024-03-31 09:31:24 GMT | rewritten | rewritten | ||
78.243.138.x/24 | 2024-04-27 20:24:36 GMT | rewritten | rewritten |
This is the address space announcement history of an AS and its customer cone, derived from prefix announcements for the AS recorded in public BGP data. For each month, we have aggregated more specific prefix announcements into contiguous address blocks, where possible. The goal of this page is to allow a network operator to judge the feasibility of deploying a static ingress access control list for their border router connecting to the AS. BCP-84 describes Ingress ACLs as "the most bulletproof solution when done properly" and the "best fit ... when the configuration is not too dynamic, ... if the number of used prefixes is low."
Year |2022 2023 2024
Month |Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr
——————————————————————+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+
37.1.232.0/21 |————————————————————————————————————————————————————————————————————————————————————————————————————
37.8.160.0/19 |————————————————————————————————————————————————————————————————————————————————————————————————————
37.160.0.0/12 |————————————————————————————————————————————————————————————————————————————————————————————————————
78.240.0.0/13 | ————————————————————————————————————————————————
——————————————————————+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+
2a0d:e480::/29 |————————————————————————————————————————————————————————————————————————————————————————————————————
——————————————————————+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+——‒+
Month |Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr
Year |2022 2023 2024