Spoofing Information for AS 6461 (ZAYO-6461)

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
207.235.139.x/242023-10-11 19:03:47 GMTrewrittenreceived

Customers of AS 6461 we have spoofer tests from

This is the list of directly connected customers of AS 6461 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
20119 (ARROW)can (Canada)23530AS 20119 testsreceived
4637 (ASN-TELSTRA-GLOBAL)hkg (Hong Kong)12943311275AS 4637 testsreceived
10745 (ARIN-ASH-CHA)usa (United States)40AS 10745 testsblocked
12876 (AS12876)fra (France)110AS 12876 testsblocked
8399 (SEWAN-FR)fra (France)300AS 8399 testsblocked
19165 (WEBPASS)usa (United States)431AS 19165 testsblocked
21928 (T-MOBILE-AS21928)usa (United States)452AS 21928 testsblocked
5645 (TEKSAVVY)can (Canada)7611AS 5645 testsblocked
13285 (OPALTELECOM-AS)gbr (United Kingdom)11815AS 13285 testsblocked
803 (SASKTEL)can (Canada)15322AS 803 testsblocked
14265 (US-TELEPACIFIC)usa (United States)40842AS 14265 testsblocked
13213 (UK2NET-AS)gbr (United Kingdom)4968AS 13213 testsblocked
28118dom (Dominican Republic)10669AS 28118 testsblocked
3737 (AS-PTD)usa (United States)2890378AS 3737 testsblocked
7029 (WINDSTREAM)usa (United States)4582642AS 7029 testsblocked
21859 (ZEN-ECN)idn (Indonesia)10865676AS 21859 testsblocked
812 (ROGERS-COMMUNICATIONS)can (Canada)262561268AS 812 testsblocked
9498 (BBIL-AP)ind (India)13717614098AS 9498 testsblocked

Address Space Announcement History

The customer cone for 6461 is too large for a prefix list to be useful.

Last Modified