Spoofing Information for AS 5650 (FRONTIER-FRTR)

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
47.145.32.x/242023-11-07 00:48:15 GMTblockedblocked
47.153.30.x/242023-09-21 19:53:11 GMTrewrittenrewritten
47.153.180.x/242023-03-08 05:51:54 GMTunknownrewritten
47.153.224.x/242023-07-29 07:27:24 GMTrewrittenrewritten
47.155.128.x/242023-08-24 14:57:24 GMTrewrittenrewritten
47.155.131.x/242023-07-28 03:00:01 GMTrewrittenrewritten
47.156.182.x/242024-02-12 04:49:32 GMTrewrittenrewritten
47.161.16.x/242023-06-08 08:06:09 GMTrewrittenrewritten
47.161.38.x/242023-07-27 16:17:38 GMTrewrittenrewritten
47.186.187.x/242024-03-01 10:44:58 GMTrewrittenrewritten
47.187.69.x/242023-03-15 09:58:34 GMTrewrittenrewritten
47.187.77.x/242023-07-06 12:47:02 GMTrewrittenrewritten
47.187.82.x/242023-08-24 20:59:53 GMTrewrittenrewritten
47.187.91.x/242023-03-08 08:49:04 GMTrewrittenrewritten
47.189.136.x/242023-07-20 15:07:31 GMTrewrittenrewritten
47.197.216.x/242024-02-16 17:26:17 GMTblockedblocked
47.203.56.x/242024-03-01 21:17:47 GMTblockedblocked
50.102.4.x/242023-12-13 04:53:03 GMTrewrittenrewritten
104.226.17.x/242023-10-24 16:25:08 GMTblockedblocked

Customers of AS 5650 we have spoofer tests from

This is the list of directly connected customers of AS 5650 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
18643 (SMART-CITY-TACC)usa (United States)20AS 18643 testsblocked
25787 (ROWE-NETWORKS)usa (United States)81AS 25787 testsblocked
19108 (SUDDENLINK-COMMUNICATIONS)usa (United States)38178AS 19108 testsblocked

Address Space Announcement History

The customer cone for 5650 is too large for a prefix list to be useful.

Last Modified