AS7521 · JP · APNIC
1
Upstream providers
4
Downstream customers
4.9k
v4 addresses
1
v6 /32s

Provider History

Active Possible trial (<90d) Historical

Current Providers

Provider First Seen Last Seen Peers Confidence
AS55391
AS55391
2024-09-01
1y 8mo
2026-05-07
96 peers
AS209 AS3549 AS6762 AS12956 AS27986 AS32590 AS49605 AS51185 AS52468 AS199524 AS216285

Customers (4)

Customer Country First Seen Last Seen IPs Peers Confidence
AS4697
AS4697
JP 2024-09-01
1y 8mo
2026-05-07 3.3k
90 peers
AS209 AS999 AS3549 AS6762 AS12956 AS27986 AS32590 AS49605 AS51185 AS52468 AS199524 AS216285
AS38644
AS38644
JP 2024-09-01
1y 8mo
2026-05-07 256
74 peers
AS209 AS999 AS3257 AS3320 AS3491 AS5580 AS6453 AS6461 AS6762 AS6830 AS7018 AS7768 AS8529 AS8582 AS12956 AS15605 AS16276 AS17350 AS22296 AS24961 AS25091 AS27678 AS27986 AS29222 AS31554 AS32590 AS35710 AS47147 AS49544 AS49605 AS51185 AS51873 AS52873 AS53062 AS199524 AS212317 AS262462 AS271253 AS328964 AS398465
AS131079
AS131079
JP 2024-09-01
1y 8mo
2026-05-07 256
74 peers
AS209 AS3549 AS6762 AS12956 AS27986 AS32590 AS49605 AS51185 AS52468 AS199524 AS216285
FLETS
AS63802
JP 2026-04-21
18d
2026-05-07 3.8k
11 peers
AS209 AS999 AS3549 AS6762 AS12956 AS27986 AS49605 AS51185 AS52468 AS199524 AS216285

Network Size

IPv4 and IPv6 prefixes originated over time

8
v4 prefixes
4.9k
v4 addresses
1
v6 prefixes
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

2026-04-22
New Transit
FLETS AS63802 → added provider AS7521 AS7521
Confidence: 90%
2024-09-02
New Transit
AS131079 AS131079 → added provider AS7521 AS7521
Confidence: 90%
2024-09-02
New Transit
AS38644 AS38644 → added provider AS7521 AS7521
Confidence: 90%
2024-09-02
New Transit
AS7521 AS7521 → added provider AS55391 AS55391
Confidence: 90%
2024-09-02
New Transit
AS4697 AS4697 → added provider AS7521 AS7521
Confidence: 90%

Renewal Calendar

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

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