Autonomous system
AS57021 NTP-SE Anycasted NTP services from Netnod IXPs
Unclassified RIPE
Summary
Netnod
ntp infrastructure anycast sweden
NTP-SE is operated by Netnod AB.
What it's used for
- The address space carries anycast NTP services, as indicated by the AS handle "Anycasted NTP services from Netnod IXPs" and the netname
NETNOD-NTPfor the 194.58.200.0/24 prefix. - The AS announces 1792 IPv4 addresses across 3 prefixes and 3 IPv6 prefixes, with 4 observed neighbours. This low neighbour count relative to the address inventory indicates a specialized service endpoint rather than a transit or access network.
- Traffic from this AS consists of Network Time Protocol requests and responses, providing time synchronization services to the internet.
Notable
- Registrants for all announced prefixes are Netnod AB, matching the AS holder.
- The address inventory is small and focused, consisting of three contiguous IPv4 blocks within the 194.58.200.0/22 range and three IPv6 prefixes under 2a01:3f7::/48.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-11, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 3 prefixes · 1.79K addresses IPv6 3 prefixes
| Country | Name | Prefixes |
|---|---|---|
| SE | Sweden | 6 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS57021- Registry name
- NTP-SE
- Registrant
- NETNOD-MNT
- Abuse contact
- abuse@netnod.se
- Registered
- 2015-12-09
- Last changed
- 2018-09-04
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 14 valid, 0 with no ROA
- ROAs
- 15 authorising AS57021
- ASPA
- no ASPA record
- IRR
- 100% registered · 14 of 14 announcements
- Route objects
- 16 naming AS57021
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
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: 431 networks and 1,768 prefixes, as published 2026-10-12. 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