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AS11721 · US · ARIN
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2
Upstream providers
0
Downstream customers
768
v4 addresses
<0.1
v6 /32s

Provider History

Active Possible trial (<90d) Historical

Current Providers

Addr family: All IPv4 IPv6
Provider First Seen Last Seen Peers Confidence AF
AS20278
AS20278
 2024-09-01
1y 9mo
 2026-06-09
180 peers
AS209 AS553 AS680 AS835 AS924 AS999 AS1031 AS1103 AS1221 AS1299 AS1828 AS2119 AS2152 AS2500 AS2914 AS3214 AS3216 AS3257 AS3320 AS3399 AS3491 AS3549 AS4128 AS4181 AS4608 AS4641 AS4775 AS5392 AS5394 AS5413 AS5580 AS6082 AS6453 AS6461 AS6730 AS6762 AS6830 AS7018 AS7768 AS8218 AS8220 AS8298 AS8426 AS8455 AS8529 AS8582 AS8660 AS8888 AS9002 AS11039 AS12307 AS12350 AS12859 AS12956 AS12969 AS13030 AS13237 AS14041 AS14315 AS14630 AS14907 AS15562 AS15605 AS16276 AS16347 AS16552 AS17290 AS17350 AS17660 AS19529 AS19754 AS20080 AS20514 AS20811 AS23367 AS23673 AS24482 AS25091 AS25220 AS28329 AS28824 AS28917 AS29691 AS30950 AS31027 AS31554 AS32590 AS34177 AS34927 AS35266 AS35280 AS35600 AS35710 AS36924 AS37697 AS38001 AS38726 AS39642 AS40387 AS40864 AS41095 AS41811 AS42473 AS42541 AS45049 AS45489 AS46450 AS47147 AS47692 AS48185 AS48237 AS48362 AS49028 AS49432 AS49434 AS49544 AS49605 AS50304 AS50628 AS50877 AS51088 AS51185 AS52075 AS52468 AS52873 AS53062 AS53828 AS55720 AS56457 AS57381 AS57630 AS57777 AS57821 AS57866 AS58308 AS58511 AS59414 AS60924 AS61832 AS63927 AS64475 AS132847 AS132884 AS134823 AS138685 AS140627 AS142271 AS142289 AS150369 AS151704 AS197580 AS199524 AS199938 AS204092 AS205206 AS209823 AS210937 AS212317 AS215230 AS216285 AS262462 AS263009 AS263152 AS263541 AS264409 AS266213 AS267613 AS271253 AS398465
v4 v6
AS53667
AS53667
 2025-02-20
1y 3mo
 2026-06-09
177 peers
AS209 AS1299 AS2914 AS3214 AS3257 AS3491 AS3549 AS4128 AS5580 AS6082 AS6453 AS6461 AS6762 AS6830 AS7018 AS7768 AS8582 AS12956 AS15562 AS15692 AS16276 AS17290 AS17660 AS48237 AS52873 AS55720 AS57866 AS132884 AS151704 AS199524 AS216285 AS262462 AS398465
v4 v6

Customers (0)

Addr family: All IPv4 IPv6
No customers in current snapshot.

Network Size

IPv4 and IPv6 prefixes originated over time

3
v4 prefixes
768
v4 addresses
5
v6 prefixes
<0.1
v6 /32s

Peering Links Over Time

Count of unclassified adjacencies per snapshot date

Event Log

All New Transit Lost Transit Possible Trial Renewal Approaching
2026-01-08
New Transit
AS11721 AS11721 → added provider AS53667 AS53667
Confidence: 90%
⇄
2025-08-07
Lost Transit
AS11721 AS11721 → lost provider AS53667 AS53667
Confidence: 85% Duration: 167d
⇄
2025-08-06
New Transit
AS11721 AS11721 → added provider AS53667 AS53667
Confidence: 90%
⇄
2025-07-23
Lost Transit
AS11721 AS11721 → lost provider AS53667 AS53667
Confidence: 85% Duration: 152d
⇄
2025-04-05
New Transit
AS11721 AS11721 → added provider AS53667 AS53667
Confidence: 90%
⇄
2025-03-29
Lost Transit
AS11721 AS11721 → lost provider AS53667 AS53667
Confidence: 85% Duration: 36d
⇄
2025-02-21
New Transit
AS11721 AS11721 → added provider AS53667 AS53667
Confidence: 90%
⇄
2024-09-02
New Transit
AS11721 AS11721 → added provider AS20278 AS20278
Confidence: 90%
⇄

Renewal Calendar

Active providers first seen 11–13 months ago — possible annual contract renewals

This data is available to subscribers.

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