Spoofing Information for AS 4837 (CHINA169-Backbone)

Spoofing status per IP block for last year of data

(Results for all dates also available.)
Spoof status key
receivedSpoofed packet was received.Pattern of tests from this IP block indicates a switch from allowing spoofing to blocking it.
rewrittenSpoofed packet was received, but the source address was changed en route.
blockedSpoofed packet was not received, but unspoofed packet was.
unknownNeither spoofed nor unspoofed packet was received.
IP blockLatest testSpoof
27.218.1.x/242023-04-09 06:53:04 GMTrewrittenrewritten
42.55.10.x/242023-04-26 07:29:03 GMTrewrittenrewritten
42.57.38.x/242023-03-27 12:09:26 GMTrewrittenrewritten
42.84.26.x/242023-07-05 03:45:36 GMTrewrittenrewritten
58.19.0.x/242023-05-22 07:15:21 GMTblockedblocked
60.18.119.x/242023-03-24 02:09:29 GMTrewrittenrewritten
60.24.14.x/242023-11-30 02:36:02 GMTblockedblocked
61.240.234.x/242023-11-21 15:33:12 GMTblockedblocked
61.242.128.x/242024-01-09 07:58:23 GMTblockedblocked
111.164.178.x/242024-02-06 07:33:59 GMTrewrittenrewritten
113.226.3.x/242023-08-15 08:30:39 GMTrewrittenrewritten
113.228.141.x/242023-05-08 10:03:08 GMTrewrittenrewritten
113.231.205.x/242023-05-02 08:07:35 GMTrewrittenrewritten
113.231.219.x/242023-03-30 01:44:37 GMTrewrittenrewritten
113.231.239.x/242023-04-08 01:28:03 GMTrewrittenrewritten
116.130.206.x/242024-01-04 12:41:48 GMTblockedblocked
116.130.208.x/242024-01-01 08:09:14 GMTblockedblocked
117.13.137.x/242023-12-14 02:33:02 GMTblockedblocked
119.113.252.x/242023-07-22 11:46:38 GMTrewrittenrewritten
119.115.254.x/242023-03-15 08:18:07 GMTrewrittenrewritten
123.188.65.x/242023-03-20 00:13:32 GMTrewrittenrewritten
123.188.67.x/242023-04-05 01:39:24 GMTrewrittenrewritten
175.162.25.x/242023-07-31 15:10:57 GMTrewrittenrewritten
175.162.27.x/242023-06-27 09:19:44 GMTrewrittenrewritten
175.162.185.x/242023-07-13 07:56:20 GMTrewrittenrewritten
175.163.45.x/242023-07-25 10:39:57 GMTrewrittenrewritten
175.163.56.x/242023-07-29 06:28:09 GMTrewrittenrewritten
175.170.19.x/242023-07-25 09:14:41 GMTrewrittenrewritten
175.172.21.x/242023-11-21 15:14:47 GMTrewrittenrewritten
175.174.99.x/242023-04-17 12:54:15 GMTrewrittenrewritten
218.68.102.x/242024-02-26 13:35:42 GMTblockedblocked
218.68.105.x/242024-02-05 08:32:43 GMTblockedblocked
218.68.107.x/242024-01-15 09:23:46 GMTblockedblocked
218.68.123.x/242024-01-08 08:31:46 GMTblockedblocked
221.7.135.x/242024-03-04 02:29:37 GMTrewrittenrewritten
221.11.46.x/242023-05-15 23:46:32 GMTrewrittenrewritten
221.197.56.x/242024-03-04 09:42:16 GMTblockedblocked
221.197.66.x/242024-01-22 09:39:28 GMTblockedblocked
221.198.235.x/242024-02-20 13:02:46 GMTblockedblocked
221.201.46.x/242023-07-09 05:28:14 GMTrewrittenrewritten
221.201.212.x/242023-08-08 10:11:55 GMTrewrittenrewritten
2408:8210:54xx::/402024-03-04 09:42:16 GMTblockedblocked
2408:8411:24xx::/402024-01-04 12:41:48 GMTblockedblocked

Customers of AS 4837 we have spoofer tests from

This is the list of directly connected customers of AS 4837 from which we have received a spoofer test, ordered by the customer's ability to send spoofed packets and the number of prefixes of an inferred ingress ACL derived from prefix announcements for the customer recorded in the latest month of public BGP data. 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." Further detail about the size and dynamism of an inferred ACL is available by following the History link for each AS.

ASNCountryNumber of Prefixes
in Customer Cone
Number of ASes
in Customer Cone
4538 (ERX-CERNET-BKB)chn (China)126838AS 4538 testsblocked
4808 (CHINA169-BJ)chn (China)159096AS 4808 testsblocked

Address Space Announcement History

The customer cone for 4837 is too large for a prefix list to be useful.

Last Modified