Autonomous system
AS34820 DANNAX-SK-AS www.dol.sk
Residential RIPE
Summary
Delta Online
cable dsl isp residential
DANNAX-SK-AS is operated by Delta Online spol. s r.o., a Slovak internet service provider.
What it's used for
- The address space carries residential and small business connectivity, evidenced by netnames such as
SK-DOL-20050314,SK-DOL-20150724, andSK-DOL-20160223registered to the operator. - The AS announces 4608 IPv4 addresses across 8 prefixes and 1 IPv6 prefix, while maintaining 41 observed neighbours; this ratio of moderate address space against a high neighbour count suggests a role focused on peering and transit exchange rather than pure access aggregation.
Notable
- Registrants for the majority of prefixes are
DELTA ONLINE spol. s r.o., with one prefix (45.152.96.0/24) registered toDelta Online Network Administratorunder the netnameFERDINANDY. - The address inventory consists of a mix of /22, /23, and /24 blocks, including a single /29 IPv6 prefix, indicating a segmented allocation strategy for different service tiers or acquisition dates.
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
Recorded at 3 exchanges in 2 countries, largest first.
| Exchange | Location | Their address |
|---|---|---|
| Peering.cz | Prague, Czech Republic | 185.0.20.148 |
| NIX.CZ - Neutral Internet eXchange for the Czech Republic | Prague, Czech Republic | 91.210.16.188 |
| Slovak Internet eXchange Bratislava | Bratislava, Slovakia | 192.108.148.182 |
Transit providers
10 upstream, 4 downstream and 23 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-22, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 8 prefixes · 4.61K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| SK | Slovakia | 9 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS34820- Registry name
- DANNAX-SK-AS
- Registrant
- MNT-DANNAX
- Abuse contact
- abuse@dol.sk
- Registered
- 2005-04-08
- Last changed
- 2018-09-04
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 11 valid, 0 with no ROA
- ROAs
- 11 authorising AS34820
- ASPA
- no ASPA record
- IRR
- 100% registered · 11 of 11 announcements
- Route objects
- 12 naming AS34820
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 1,779 prefixes, as published 2026-10-23. 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