asn.dev

Autonomous system

AS209554 ISIF-AS

Residential RIPE Cable/DSL/ISP

IPv4 addresses 6.91K 13 prefixes
IPv6 prefixes 51 counted as prefixes, not addresses
Countries 1 mostly EE
Exchanges 1 recorded by PCH
Upstreams 6 3 downstream
Flagged prefixes 0 none

Interconnection

Peering at a glance

Full topology · Graph

Internet exchanges

Recorded at 1 exchange in 1 country, largest first.

ExchangeLocationTheir address
Local Internet Exchange DüsseldorfDüsseldorf, Germany185.1.155.124

Transit providers

6 upstream, 3 downstream and 16 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS4743ISIF LIMITED1,350
AS49304SAKURA LINK LIMITED1,016
AS3204xTom OU74
AS7720Skywolf Technology LLC32
AS199854Jens Thies2
AS401753BIXCE Inc2

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-14, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 13 prefixes · 6.91K addresses IPv6 51 prefixes

CountryNamePrefixes
EEEstonia64

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS209554
Registry name
ISIF-AS
Registrant
ISIF-MNT
Abuse contact
abuse@isif.net
Registered
2022-12-27
Last changed
2025-12-09
Allocation
allocated

Declared

PeeringDB profile

self-reported
Name
ISIF Network
Also known as
ISIF
Network type
Cable/DSL/ISP
Scope
Global
Peering policy
Open
IRR as-set
AS209554:AS-ISIF
Present at
3 exchanges
Facilities
9 facilities
Website
https://isif.net

PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 75 valid, 0 with no ROA
ROAs
36 authorising AS209554
ASPA
no ASPA record
IRR
99% registered · 74 of 75 announcements 1 other origin
Route objects
452 naming AS209554

Reputation

Classification and threat

Residential Fixed-line consumer ISP. Addresses here are homes.

Spamhaus DROP

Not on ASN-DROP The network as a whole is not listed.

No DROP prefixes None of its announced space is on the DROP prefix list.

Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 442 networks and 1,772 prefixes, as published 2026-10-15. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.

FBI IC3

No IC3 indicators Nothing from the FBI IC3 feed.

IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.

Elsewhere

Cross-check