Autonomous system
AS51859 MNSHA-AS
Unclassified APNIC Content
Summary
Mainstream
isp residential telecom serbia
MNSHA-AS is operated by Mainstream doo Beograd.
What it's used for
- The address space carries residential and business telecommunications traffic, evidenced by registrants such as "Mainstream RIPE Team" and netnames like
RS-CRI-19950519andMainstream. - The AS announces 13,824 IPv4 addresses across 16 prefixes and 5 IPv6 prefixes, while maintaining only 7 observed neighbours, a ratio indicative of an access or eyeball network rather than a transit provider.
- As a regional telecommunications operator in Serbia, the traffic consists primarily of subscriber internet access, including broadband and mobile services for end-users.
Notable
- Registrants are consistent with the announcer, with most prefixes registered to "Mainstream RIPE Team" and "Mainstream doo Beograd", though some blocks show historical ties to "Telemach RIPE Team BBN" and "Vivacom Bulgaria EAD".
- The inventory includes a mix of legacy and modern allocations, with netnames ranging from
RS-CRI-19950519toRS-CRI-20181121, reflecting a long-standing presence in the region. - The address inventory is finely subdivided into /22, /23, and /24 blocks, suggesting site-by-site or service-specific segmentation within the corporate estate.
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 |
|---|---|---|
| Serbian Open Exchange | Belgrade, Serbia | 185.1.27.51 |
Transit providers
7 upstream, 0 downstream and 9 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 2026-10-11, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 16 prefixes · 13.82K addresses IPv6 5 prefixes
| Country | Name | Prefixes |
|---|---|---|
| RS | Serbia | 21 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS51859- Registry name
- MNSHA-AS
- Registrant
- MNSHA-MNT
- Abuse contact
- abuse@mainstream.rs
- Registered
- 2010-11-17
- Last changed
- 2025-10-21
- Allocation
- allocated
Declared
PeeringDB profile
- Name
- Mainstream
- Also known as
- Mainstream
- Network type
- Content
- Scope
- Regional
- Traffic ratio
- Heavy Outbound
- Peering policy
- Open
- IRR as-set
AS-MNSHA- Present at
- 1 exchanges
- Facilities
- 5 facilities
- Website
- https://www.mainstream.eu/
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
- 97% valid · 37 valid, 1 with no ROA
- ROAs
- 20 authorising AS51859
- ASPA
- no ASPA record
- IRR
- 100% registered · 38 of 38 announcements
- Route objects
- 56 naming AS51859
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