AS21561 · US · ARIN
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2
Upstream providers
0
Downstream customers
256
v4 addresses
0
v6 /32s

Provider History

Active Possible trial (<90d) Historical

Current Providers

Provider First Seen Last Seen Peers Confidence
TDS-AS
AS4181
 2024-10-01
1y 7mo
 2026-05-02
92 peers
AS174 AS209 AS260 AS999 AS1031 AS3257 AS3320 AS3491 AS3549 AS5392 AS5580 AS6424 AS6453 AS6461 AS6730 AS6762 AS6830 AS7018 AS8218 AS12350 AS12956 AS13830 AS14315 AS14840 AS16260 AS27678 AS27986 AS29504 AS30950 AS31510 AS34177 AS34800 AS34927 AS35710 AS40864 AS41811 AS48112 AS49544 AS49605 AS51185 AS52468 AS52873 AS56457 AS61138 AS64112 AS64475 AS136557 AS150369 AS151326 AS151704 AS197580 AS198150 AS199524 AS202365 AS262462 AS263009 AS266213 AS271253 AS327960 AS328840
AS25899
AS25899
 2024-10-01
1y 7mo
 2026-05-02
30 peers
AS209 AS3320 AS3491 AS6461 AS6762 AS7594 AS8218 AS8220 AS14907 AS15605 AS16276 AS38008 AS46997 AS49434 AS51185 AS52468 AS134823 AS199524 AS216285

Customers (0)

No customers in current snapshot.

Network Size

IPv4 and IPv6 prefixes originated over time

1
v4 prefixes
256
v4 addresses
0
v6 prefixes
0
v6 /32s

Unclassified Peers Over Time

Count of unclassified adjacencies per snapshot date

Event Log

All New Transit Lost Transit Possible Trial Renewal Approaching
2024-11-02
New Transit
AS21561 AS21561 → added provider AS25899 AS25899
Confidence: 90%
⇄
2024-11-02
New Transit
AS21561 AS21561 → added provider TDS-AS AS4181
Confidence: 90%
⇄
2024-10-02
New Transit
AS21561 AS21561 → added provider AS25899 AS25899
Confidence: 90%
⇄
2024-10-02
New Transit
AS21561 AS21561 → added provider TDS-AS AS4181
Confidence: 90%
⇄

Renewal Calendar

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

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