Network topology

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

AS21234

Currently announcedSnapshot awaiting refresh

GRENKE Service GmbH · GRENKE

Last observed10/1/2026, 07:02:09Open ASN profile →

AS21234 relationship topology

Showing 2 / 2

AS21234GRENKE Service GmbH

UpstreamDownstreamUncertain relationshipNodes are ordered by observed weight

SELECTED NODEAS12843TELEMAXX TelemaxX Telekommunikation GmbH

Relationship: Upstream
Observed weight: 420
ASN registration country: Germany
Latest RIS data: 9/30/2026, 00:00:00

Open AS12843 profile →

All adjacent autonomous systems

The table preserves every relationship in the selected filter; graph limits and pagination never remove data.

2 relationships

ASN	Organization	Relationship	ASN registration country	RIS observation start	Latest RIS data	IPv4	IPv6
AS12843Observed weight 420	TELEMAXX TelemaxX Telekommunikation GmbH	Upstream	Germany	8/21/2019, 00:00:00	9/30/2026, 00:00:00	338	361
AS12337Observed weight 281	NORIS-NETWORK noris network AG	Upstream	Germany	8/21/2019, 00:00:00	9/30/2026, 00:00:00	359	0

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