KOLT-AS

AS51973 · RU · RIPENCC

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Upstream providers

Downstream customers

8.2k

v4 addresses

v6 /32s

Provider History

Active Possible trial (<90d) Historical

Current Providers

Addr family: All IPv4 IPv6

Provider	First Seen	Last Seen	Peers	Confidence	AF
RASCOM-AS AS20764	2025-01-28 1y 4mo	2026-06-11	61 peers AS209 AS3549		v4 v6
INETCOM AS35598	2024-09-01 1y 9mo	2026-06-11	28 peers AS3491 AS7018		v4 v6

Customers (2)

Addr family: All IPv4 IPv6

Customer	Country	First Seen	Last Seen	IPs	Peers	Confidence	AF
PROGRESSTECH AS49954	RU	2024-09-01 1y 9mo	2026-06-11	768	32 peers AS209 AS3549		v4 v6
STARLINE AS201511	RU	2024-09-01 1y 9mo	2026-06-11	512	52 peers AS3491 AS7018		v4 v6

Network Size

IPv4 and IPv6 prefixes originated over time

v4 prefixes

8.2k

v4 addresses

v6 prefixes

v6 /32s

Peering Links Over Time

Count of unclassified adjacencies per snapshot date

Event Log

All New Transit Lost Transit Possible Trial Renewal Approaching

2026-05-24

Lost Transit

STARLINE AS201511 → lost provider KOLT-AS AS51973

Confidence: 85% Duration: 629d

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2026-04-29

Lost Transit

STARLINE AS201511 → lost provider KOLT-AS AS51973

Confidence: 85% Duration: 604d

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2026-04-09

Lost Transit

STARLINE AS201511 → lost provider KOLT-AS AS51973

Confidence: 85% Duration: 584d

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2026-04-02

New Transit

STARLINE AS201511 → added provider KOLT-AS AS51973

Confidence: 90%

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2026-03-26

Lost Transit

STARLINE AS201511 → lost provider KOLT-AS AS51973

Confidence: 85% Duration: 570d

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2026-02-27

New Transit

STARLINE AS201511 → added provider KOLT-AS AS51973

Confidence: 90%

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2026-02-17

Lost Transit

STARLINE AS201511 → lost provider KOLT-AS AS51973

Confidence: 85% Duration: 533d

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2026-01-01

New Transit

STARLINE AS201511 → added provider KOLT-AS AS51973

Confidence: 90%

⇄

2025-11-20

Lost Transit

PROGRESSTECH AS49954 → lost provider KOLT-AS AS51973

Confidence: 85% Duration: 444d

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2025-11-01

Lost Transit

STARLINE AS201511 → lost provider KOLT-AS AS51973

Confidence: 85% Duration: 425d

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2025-11-01

Lost Transit

KOLT-AS AS51973 → lost provider MIRAN-AS AS41722

Confidence: 85% Duration: 425d

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2025-11-01

Lost Transit

PROGRESSTECH AS49954 → lost provider KOLT-AS AS51973

Confidence: 85% Duration: 425d

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2025-10-08

Lost Transit

STARLINE AS201511 → lost provider KOLT-AS AS51973

Confidence: 85% Duration: 401d

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2025-10-08

Possible Trial

KOLT-AS AS51973 → possible trial with BEMYLINK AS62255

Confidence: 60%

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2025-10-01

Lost Transit

KOLT-AS AS51973 → lost provider BEMYLINK AS62255

Confidence: 85% Duration: 32d

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2025-08-30

New Transit

KOLT-AS AS51973 → added provider BEMYLINK AS62255

Confidence: 90%

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2025-07-05

Lost Transit

PROGRESSTECH AS49954 → lost provider KOLT-AS AS51973

Confidence: 85% Duration: 306d

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2025-06-19

New Transit

PROGRESSTECH AS49954 → added provider KOLT-AS AS51973

Confidence: 90%

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2025-06-12

Lost Transit

PROGRESSTECH AS49954 → lost provider KOLT-AS AS51973

Confidence: 85% Duration: 283d

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2025-05-02

New Transit

PROGRESSTECH AS49954 → added provider KOLT-AS AS51973

Confidence: 90%

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2025-04-24

Lost Transit

PROGRESSTECH AS49954 → lost provider KOLT-AS AS51973

Confidence: 85% Duration: 234d

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2025-04-12

Lost Transit

PROGRESSTECH AS49954 → lost provider KOLT-AS AS51973

Confidence: 85% Duration: 222d

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2025-03-22

Lost Transit

PROGRESSTECH AS49954 → lost provider KOLT-AS AS51973

Confidence: 85% Duration: 201d

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2025-01-29

New Transit

KOLT-AS AS51973 → added provider RASCOM-AS AS20764

Confidence: 90%

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2024-12-25

New Transit

PROGRESSTECH AS49954 → added provider KOLT-AS AS51973

Confidence: 90%

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2024-11-28

Lost Transit

PROGRESSTECH AS49954 → lost provider KOLT-AS AS51973

Confidence: 85% Duration: 87d

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2024-09-02

New Transit

STARLINE AS201511 → added provider KOLT-AS AS51973

Confidence: 90%

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2024-09-02

New Transit

KOLT-AS AS51973 → added provider MIRAN-AS AS41722

Confidence: 90%

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2024-09-02

New Transit

KOLT-AS AS51973 → added provider INETCOM AS35598

Confidence: 90%

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2024-09-02

New Transit

PROGRESSTECH AS49954 → added provider KOLT-AS AS51973

Confidence: 90%

⇄

Renewal Calendar

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

This data is available to subscribers.