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AS21508 · US · ARIN
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1
Upstream providers
22
Downstream customers
71k
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
AS7922
AS7922
 2024-09-01
1y 9mo
 2026-06-09
7 peers
AS209 AS3549
v4 v6

Customers (22)

Addr family: All IPv4 IPv6
Customer Country First Seen Last Seen IPs Peers Confidence AF
AS11739
AS11739
 US 2024-09-01
1y 9mo
 2026-06-09 256
4 peers
AS209 AS3549
v4 v6
CLOUDFLARENET-AS
AS13335
 US 2024-09-01
1y 9mo
 2026-06-09 512
4 peers
AS209
v4 v6
AS15173
AS15173
 US 2024-09-01
1y 9mo
 2026-06-09 66k
4 peers
AS209 AS3549
v4 v6
AS15297
AS15297
 US 2024-09-01
1y 9mo
 2026-06-09 768
4 peers
AS209 AS3549
v4 v6
AS19923
AS19923
 US 2024-09-01
1y 9mo
 2026-06-09 256
4 peers
AS209 AS3549
v4 v6
AS32540
AS32540
 US 2024-09-01
1y 9mo
 2026-06-09 256
4 peers
AS209 AS3549
v4 v6
AS36244
AS36244
 US 2024-09-01
1y 9mo
 2026-06-09 512
4 peers
AS209 AS3549
v4 v6
AS36364
AS36364
 US 2024-09-01
1y 9mo
 2026-06-09 768
4 peers
AS209 AS3549
v4 v6
AS40641
AS40641
 US 2024-09-01
1y 9mo
 2026-06-09 7.9k
4 peers
AS209 AS3549
v4 v6
AS54219
AS54219
 US 2024-09-01
1y 9mo
 2026-06-09 256
4 peers
AS209 AS3549
v4 v6
AS54883
AS54883
 US 2024-09-01
1y 9mo
 2026-06-09 256
4 peers
AS209 AS3549
v4 v6
AS393591
AS393591
 US 2024-09-01
1y 9mo
 2026-06-09 2.6k
3 peers
AS209
v4 v6
AS396083
AS396083
 US 2024-09-01
1y 9mo
 2026-06-09 512
4 peers
AS209 AS3549
v4 v6
AS399099
AS399099
 US 2024-09-01
1y 9mo
 2026-06-09 256
4 peers
AS209 AS3549
v4 v6
AS399232
AS399232
 US 2024-09-01
1y 9mo
 2026-06-09 256
2 peers
AS209
v4 v6
AS400114
AS400114
 US 2024-09-01
1y 9mo
 2026-06-09 512
4 peers
AS209 AS3549
v4 v6
AS395772
AS395772
 US 2024-09-07
1y 9mo
 2026-06-09 512
4 peers
AS209 AS3549
v4 v6
AS399607
AS399607
 US 2024-09-24
1y 8mo
 2026-06-09 256
3 peers
AS209
v4 v6
AS18773
AS18773
 US 2025-03-24
1y 2mo
 2026-06-09 3.8k
2 peers
AS209
v4 v6
AS36040
AS36040
 US 2025-08-22
9mo
 2026-06-09 256
3 peers
AS209 AS3549
v4 v6
AS394276
AS394276
 US 2025-10-01
8mo
 2026-06-09 —
1 peer
AS209
v4 v6
AS399938
AS399938
 US 2026-02-13
4mo
 2026-06-09 256
2 peers
AS209 AS3549
v4 v6

Network Size

IPv4 and IPv6 prefixes originated over time

18
v4 prefixes
71k
v4 addresses
63
v6 prefixes
<0.1
v6 /32s

Downstream Customers Over Time

Count of distinct downstream customers per snapshot date

Peering Links Over Time

Count of unclassified adjacencies per snapshot date

Event Log

All New Transit Lost Transit Possible Trial Renewal Approaching
2025-08-23
New Transit
AS36040 AS36040 → added provider AS21508 AS21508
Confidence: 90%
⇄
2025-07-30
New Transit
AS15297 AS15297 → added provider AS21508 AS21508
Confidence: 90%
⇄
2025-07-25
New Transit
AS14583 AS14583 → added provider AS21508 AS21508
Confidence: 90%
⇄
2025-05-08
New Transit
AS397483 AS397483 → added provider AS21508 AS21508
Confidence: 90%
⇄
2025-02-28
New Transit
AS395441 AS395441 → added provider AS21508 AS21508
Confidence: 90%
⇄
2025-02-18
New Transit
AS399607 AS399607 → added provider AS21508 AS21508
Confidence: 90%
⇄
2024-12-18
New Transit
AS397190 AS397190 → added provider AS21508 AS21508
Confidence: 90%
⇄
2024-12-11
New Transit
AS393861 AS393861 → added provider AS21508 AS21508
Confidence: 90%
⇄
2024-10-26
New Transit
GSVNET-AS AS2134 → added provider AS21508 AS21508
Confidence: 90%
⇄
2024-10-06
New Transit
AS395441 AS395441 → added provider AS21508 AS21508
Confidence: 90%
⇄
2024-09-08
New Transit
AS395772 AS395772 → added provider AS21508 AS21508
Confidence: 90%
⇄
2024-09-02
New Transit
AS400114 AS400114 → added provider AS21508 AS21508
Confidence: 90%
⇄
2024-09-02
New Transit
AS399099 AS399099 → added provider AS21508 AS21508
Confidence: 90%
⇄
2024-09-02
New Transit
AS397039 AS397039 → added provider AS21508 AS21508
Confidence: 90%
⇄
2024-09-02
New Transit
AS396083 AS396083 → added provider AS21508 AS21508
Confidence: 90%
⇄
2024-09-02
New Transit
AS394058 AS394058 → added provider AS21508 AS21508
Confidence: 90%
⇄
2024-09-02
New Transit
AS54883 AS54883 → added provider AS21508 AS21508
Confidence: 90%
⇄
2024-09-02
New Transit
AS54391 AS54391 → added provider AS21508 AS21508
Confidence: 90%
⇄
2024-09-02
New Transit
AS54219 AS54219 → added provider AS21508 AS21508
Confidence: 90%
⇄
2024-09-02
New Transit
AS40641 AS40641 → added provider AS21508 AS21508
Confidence: 90%
⇄
2024-09-02
New Transit
AS40485 AS40485 → added provider AS21508 AS21508
Confidence: 90%
⇄
2024-09-02
New Transit
AS40400 AS40400 → added provider AS21508 AS21508
Confidence: 90%
⇄
2024-09-02
New Transit
AS40323 AS40323 → added provider AS21508 AS21508
Confidence: 90%
⇄
2024-09-02
New Transit
AS40288 AS40288 → added provider AS21508 AS21508
Confidence: 90%
⇄
2024-09-02
New Transit
AS36364 AS36364 → added provider AS21508 AS21508
Confidence: 90%
⇄
2024-09-02
New Transit
AS36244 AS36244 → added provider AS21508 AS21508
Confidence: 90%
⇄
2024-09-02
New Transit
AS33296 AS33296 → added provider AS21508 AS21508
Confidence: 90%
⇄
2024-09-02
New Transit
AS32540 AS32540 → added provider AS21508 AS21508
Confidence: 90%
⇄
2024-09-02
New Transit
AS21508 AS21508 → added provider AS7922 AS7922
Confidence: 90%
⇄
2024-09-02
New Transit
AS19923 AS19923 → added provider AS21508 AS21508
Confidence: 90%
⇄
2024-09-02
New Transit
AS-WSI-ECOM-WEST AS17381 → added provider AS21508 AS21508
Confidence: 90%
⇄
2024-09-02
New Transit
AS15297 AS15297 → added provider AS21508 AS21508
Confidence: 90%
⇄
2024-09-02
New Transit
AS15173 AS15173 → added provider AS21508 AS21508
Confidence: 90%
⇄
2024-09-02
New Transit
AS14583 AS14583 → added provider AS21508 AS21508
Confidence: 90%
⇄
2024-09-02
New Transit
AS13952 AS13952 → added provider AS21508 AS21508
Confidence: 90%
⇄
2024-09-02
New Transit
CLOUDFLARENET-AS AS13335 → added provider AS21508 AS21508
Confidence: 90%
⇄
2024-09-02
New Transit
AS11739 AS11739 → added provider AS21508 AS21508
Confidence: 90%
⇄
2024-09-02
New Transit
GSVNET-AS AS2134 → added provider AS21508 AS21508
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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