AS51859 — MNSHA-AS Mainstream doo Beograd

AS51859 announces 16 IPv4 prefixes covering 13,824 addresses and 1 IPv6 prefixes.

About this network

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-19950519 and Mainstream.
• 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-19950519 to RS-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.

Announced prefixes

• 87.237.201.0/24
• 87.237.202.0/23
• 87.237.204.0/22
• 91.185.199.0/24
• 91.185.218.0/23
• 91.185.223.0/24
• 91.214.200.0/22
• 91.222.4.0/22
• 92.249.52.0/22
• 185.29.100.0/22
• 185.167.144.0/22
• 185.168.19.0/24
• 188.93.120.0/22
• 206.15.32.0/20
• 212.72.214.0/24
• 213.91.181.0/24
• 2a04:2e40::/29

Upstream networks

• AS21215 UNITED GROUP NETWORK INFRASTRUCTURE d.o.o. Beograd
• AS8400 TELEKOM SRBIJA a.d.
• AS8866 Vivacom Bulgaria EAD
• AS31042 Yettel d.o.o.
• AS3212 Telemach Slovenija d.o.o.
• AS15958 CETIN Ltd. Belgrade
• AS13004 Serbian Open Exchange DOO

Adjacent networks

• AS21215 UNITED GROUP NETWORK INFRASTRUCTURE d.o.o. Beograd
• AS8400 TELEKOM SRBIJA a.d.
• AS8866 Vivacom Bulgaria EAD
• AS31042 Yettel d.o.o.
• AS3212 Telemach Slovenija d.o.o.
• AS15958 CETIN Ltd. Belgrade
• AS13004 Serbian Open Exchange DOO

Routing security

• RPKI: 37 valid, 0 invalid and 1 not-found announcements; 20 ROAs.
• ASPA: none published.
• IRR: 89% of announcements registered; 56 route objects.
• Listed in as-sets: AS-BTC-UP, AS-HRHINET, AS-HURRICANE, AS-MNSHA, AS-ORIONTELEKOM, AS-RETN-ACTUAL-V4, AS-RETN-ACTUAL-V6, AS-SOX, AS-SOX-SERBIA, AS-SOX-SRB, AS-TELEMACH, AS-TELEMACH6, AS-TELENORDOO, AS3212:AS-TELEMACH, AS3212:AS-TELEMACH6.

Internet exchanges

• Serbian Open Exchange — Belgrade, Serbia