AS21873 · US · ARIN
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2
Upstream providers
0
Downstream customers
8.2k
v4 addresses
0
v6 /32s

Provider History

Active Possible trial (<90d) Historical

Current Providers

Provider First Seen Last Seen Peers Confidence
AS14371
AS14371
 2025-01-01
1y 3mo
 2026-04-29
41 peers
AS209 AS260 AS1299 AS3257 AS5580 AS8582 AS16260 AS398465
AS12042
AS12042
 2025-01-01
1y 3mo
 2026-04-29
33 peers
AS209 AS2914 AS3320 AS3491 AS3549 AS6453 AS6762 AS6830 AS7018 AS12956 AS15562 AS15692 AS16276 AS17660 AS27986 AS31554 AS32590 AS48237 AS49544 AS52873 AS57866 AS132884 AS151704 AS199524 AS262462 AS267613 AS328964 AS398465

Customers (0)

No customers in current snapshot.

Network Size

IPv4 and IPv6 prefixes originated over time

25
v4 prefixes
8.2k
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
2026-01-01
New Transit
AS21873 AS21873 → added provider AS12042 AS12042
Confidence: 90%
⇄
2025-11-27
Lost Transit
AS21873 AS21873 → lost provider AS12042 AS12042
Confidence: 85% Duration: 329d
⇄
2025-04-02
New Transit
AS21873 AS21873 → added provider AS14371 AS14371
Confidence: 90%
⇄
2025-04-02
New Transit
AS21873 AS21873 → added provider AS12042 AS12042
Confidence: 90%
⇄
2025-01-02
New Transit
AS21873 AS21873 → added provider AS14371 AS14371
Confidence: 90%
⇄
2025-01-02
New Transit
AS21873 AS21873 → added provider AS12042 AS12042
Confidence: 90%
⇄

Renewal Calendar

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

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