Autonomous system
AS43700 CO-AS UAB Consilium Optimum
Residential APNIC Cable/DSL/ISP
Summary
Fastlink
isp residential cable dsl
CO-AS is operated by UAB Consilium Optimum, a Lithuanian cable and DSL internet service provider known commercially as Fastlink.
What it's used for
- The address space carries residential broadband traffic, evidenced by reverse DNS entries such as
cl-78-158-8-0.fastlink.ltand netnames likeLT-CONSILIUMOPTIMUM-20070831. - The AS announces 17,408 IPv4 addresses across 10 prefixes with 6 observed neighbours, a ratio consistent with an access network serving end-user subscribers rather than transit.
- Traffic from this AS consists of subscriber eyeballs accessing the internet via cable and DSL connections in the Vilnius region.
Notable
- Registrants for most prefixes are UAB Consilium Optimum or its Network Operation Center, aligning with the AS holder; one prefix, 185.254.44.0/22, is registered to UAB Internetas Vilniuje.
- The inventory includes a mix of /22 blocks and a single /19, with the largest block 78.158.0.0/19 accounting for the majority of the announced address space.
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 1 exchange in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| Baltic Internet Exchange | Vilnius, Lithuania | 77.241.206.18 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-04, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 10 prefixes · 17.41K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| LT | Lithuania | 10 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS43700- Registry name
- CO-AS
- Registrant
- MNT-CONSILIUM_OPTIMUM
- Abuse contact
- info@fastlink.lt
- Registered
- 2007-09-14
- Last changed
- 2026-06-10
- Allocation
- allocated
Declared
PeeringDB profile
- Name
- Consilium Optimum
- Also known as
- Fastlink
- Network type
- Cable/DSL/ISP
- Scope
- Regional
- Traffic ratio
- Balanced
- Peering policy
- Open
- Present at
- 2 exchanges
- Facilities
- 2 facilities
- Website
- http://www.fastlink.lt
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
- RPKI
- 100% valid · 10 valid, 0 with no ROA
- ROAs
- 14 authorising AS43700
- ASPA
- no ASPA record
- IRR
- 100% registered · 10 of 10 announcements
- Route objects
- 26 naming AS43700
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: 453 networks and 1,853 prefixes, as published 2026-11-05. 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