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	Prefix	Description
	46.227.36.0/23	Telemedian
	46.227.38.0/23	Telemedian
	178.19.176.0/20	Citylink Telecom Sp. z o.o.
	2a02:26e8::/32	Citylink Telecom Sp. z o.o.

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Network Policy

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How are upstreams and downstreams calculated?

Upstreams

	ASN	Description	IPv4	IPv6
	AS3356	Lumen (Level 3)	✔	✘
	AS9002	RETN Limited	✔	✔
	AS6939	Hurricane Electric LLC	✘	✔
	AS50263	A-Systems Sp. z o.o.	✘	✔

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Peers

	ASN	Description	IPv4	IPv6
	AS41865	BIALL-NET Sp. z o.o.	✔	✘
	AS3356	Lumen (Level 3)	✔	✘
	AS50263	A-Systems Sp. z o.o.	✔	✔
	AS6939	Hurricane Electric LLC	✘	✔
	AS206651	Telemedian Sp. z o.o.	✔	✘
	AS9002	RETN Limited	✔	✔
	AS137409	GSL Networks Pty LTD	✔	✔
	AS56408	Gdansk Airport Sp. z o.o.	✔	✘
	AS6204	INTERKVM HOST SRL	✔	✔
	AS61049	Exascale Ltd	✔	✔
	AS24961	WIIT AG (fka. myLoc Managed IT AG)	✔	✘
	AS24940	Hetzner Online GmbH	✔	✔
	AS34927	iFog GmbH	✔	✔
	AS8218	Zayo Europe	✔	✔
	AS14840	BR.DIGITAL	✔	✘
	AS52025	ParadoxNetworks Limited	✔	✔
	AS49544	i3D.net B.V	✔	✔
	AS51976	JP-Telekom Sp z o.o.	✔	✘
	AS42739	Hawe Telekom S.A. in Restructuring	✔	✘
	AS21263	TeleData GmbH	✔	✔
	AS24482	SG.GS	✔	✔
	AS201054	Stowarzyszenie e-Poludnie	✔	✔
	AS202520	SkyPass Solutions Sp. z.o.o.	✔	✘
	AS212477	RoyaleHosting B.V.	✔	✘
	AS211623	NAML B.V.	✔	✔
	AS32590	Valve Corporation	✔	✔
	AS44854	Arend Brouwer	✔	✔
	AS207994	Blockchain Creek B.V.	✔	✘
	AS44901	Belcloud LTD	✔	✘
	AS199524	Gcore S.A.	✔	✔
	AS53062	ALT | GRUPO BRASIL TECPAR	✔	✘
	AS34170	Aztelekom LLC	✔	✘
	AS215248	Bastiaan Mathijs Brink	✔	✔
	AS62403	PletX GmbH	✔	✔
	AS30823	aurologic GmbH	✔	✘
	AS55285	Serverside.com	✔	✘
	AS57344	Telehouse EAD	✔	✘
	AS49434	FBW NETWORKS SAS	✔	✘
	AS8801	Rocket Fibre Ltd	✔	✔
	AS36236	NetActuate, Inc	✔	✔
	AS57304	RETN Russia	✔	✔
	AS29049	Delta Telecom Ltd	✔	✘
	AS9009	M247 Europe SRL	✔	✘
	AS51396	Pfcloud UG (haftungsbeschrankt)	✔	✔
	AS1820	WNET TELECOM USA Corp.	✔	✘
	AS50392	LLC Campus Networks	✔	✔
	AS22356	Durand do Brasil Ltda	✔	✘
	AS42295	TBISS Ltd	✔	✘
	AS212895	Johannes Ernst	✔	✘
	AS30058	FDCservers.net	✔	✘
	AS48011	Turunc Smart Bilgisayar Teknoloji Ve Dis Ticaret Limi...	✔	✘
	AS49559	A-Systems Sp. z o.o.	✔	✘
	AS9498	Bharti Airtel Ltd.	✔	✘
	AS51465	M3.NET Sp. z o.o. / Fixmap Group	✔	✘
	AS8764	Telia Lietuva, AB	✔	✘
	AS214762	Sebastian Stefanek trading as MatHost.eu	✘	✔
	AS20555	Akademia WIT w Warszawie	✔	✘
	AS59711	HZ Hosting Ltd	✔	✘
	AS35320	Eurotranstelecom Ltd	✔	✘
	AS208041	Rafal Rajba trading as Intertell sp. z o.o.	✔	✘
	AS8772	NetAssist LLC	✔	✘
	AS30886	PP KOM i TEX	✘	✔

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Downstreams

	ASN	Description	IPv4	IPv6
	AS41865	BIALL-NET Sp. z o.o.	✔	✘
	AS206651	Telemedian Sp. z o.o.	✔	✘
	AS56408	Gdansk Airport Sp. z o.o.	✔	✘

aut-num:        AS51155
as-name:        TBTELECOM
org:            ORG-TTSz1-RIPE
import:         from AS8545 accept ANY
import:         from AS174 accept ANY
import:         from AS48850 accept ANY
import:         from AS15169 accept ANY
export:         to AS8545 announce AS51155
export:         to AS174 announce AS51155
export:         to AS48850 announce AS-TBTELECOM-EPIX-OpenPeering
export:         to AS15169 announce AS51155:AS-CITYLINK-GOOGLE
admin-c:        DUMY-RIPE
tech-c:         DUMY-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         AS51155-MNT
created:        2010-06-09T13:24:47Z
last-modified:  2024-10-03T18:25:10Z
source:         RIPE
remarks:        ****************************
remarks:        * THIS OBJECT IS MODIFIED
remarks:        * Please note that all data that is generally regarded as personal
remarks:        * data has been removed from this object.
remarks:        * To view the original object, please query the RIPE Database at:
remarks:        * http://www.ripe.net/whois
remarks:        ****************************


organisation:   ORG-TTSz1-RIPE
org-name:       Citylink Telecom Sp. z o.o.
country:        PL
org-type:       LIR
address:        Dummy address for ORG-TTSz1-RIPE
# Email removed, Log into bgp.tools to see whois emails
abuse-c:        AR16453-RIPE
mnt-ref:        RIPE-NCC-HM-MNT
mnt-ref:        AS51155-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         AS51155-MNT
created:        2010-05-17T09:44:46Z
last-modified:  2024-11-27T15:29:54Z
source:         RIPE
remarks:        ****************************
remarks:        * THIS OBJECT IS MODIFIED
remarks:        * Please note that all data that is generally regarded as personal
remarks:        * data has been removed from this object.
remarks:        * To view the original object, please query the RIPE Database at:
remarks:        * http://www.ripe.net/whois
remarks:        ****************************

Last Update: 2026-03-11T03:24:02Z UTC

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Member of the following AS-SETs

-	Member
RIPE	as-tbtelecom-epix-openpeering
RADB	as-hurricanev6
RIPE	as-tbtelecom-level3
RIPE	as-51155_customers
RIPE	as-tbtelecom-epix-polmix
RIPE	as51155:as-citylink-google
RIPE	as-retn-actual-v4
RIPE	as5550:as-task
RIPE	as-vectra
RIPE	as-plix-connected
RIPE	as5617:as-pl
RIPE	as-gix-gdansk
RIPE	as51155:as-citylink-gnm
LEVEL3	as-lumen-customers-asns
RIPE	as-retn-actual-v6
RIPE	as-plixdc-transit
RIPE	as-jarsat
RIPE	as-plixdc-mix
RIPE	as12831:as-task-com-pcws
RIPE	as-tbtelecom
RIPE	as-tbtelecom-equinix
RIPE	as12831:as-task-com-pionier-tp
RIPE	as51155:as-citylink-retn
RIPE	as51155:as-citylink-iq
RIPE	as51155:as-citylink-1-ix
RIPE	as-tbtelecom-cogent
RIPE	as5550:as-task-1014