Network topology

Relationships come from RIS AS_PATH observations; direction represents path position, not a commercial contract or traffic direction.

AS21235

Currently announcedSnapshot awaiting refresh

ADVANCED Systemhaus GmbH · ADVANCED-SYSTEMHAUS

Last observed10/1/2026, 07:02:12Open ASN profile →

AS21235 relationship topology

Showing 3 / 3

AS21235ADVANCED Systemhaus GmbH

UpstreamDownstreamUncertain relationshipNodes are ordered by observed weight

SELECTED NODEAS12731IPHH IPHH Internet Port Hamburg GmbH

Relationship: Upstream
Observed weight: 327
ASN registration country: Germany
Latest RIS data: 11/1/2026, 00:00:00

Open AS12731 profile →

All adjacent autonomous systems

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3 relationships

ASN	Organization	Relationship	ASN registration country	RIS observation start	Latest RIS data	IPv4	IPv6
AS12731Observed weight 327	IPHH IPHH Internet Port Hamburg GmbH	Upstream	Germany	8/21/2019, 00:00:00	11/1/2026, 00:00:00	903	269
AS174Observed weight 62	COGENT-174 - Cogent Communications, LLC	Upstream	United States	8/21/2019, 00:00:00	11/1/2026, 00:00:00	121	46
AS3257Observed weight 38	GTT-BACKBONE GTT Communications Inc.	Upstream	Germany	8/21/2019, 00:00:00	11/1/2026, 00:00:00	50	38

CHA.LA ASN relationship snapshotRelationships are normalized by CHA.LA from collected routing observations and registration context.CHA.LA routing observations · registration context