AS215305 — retzor-as Mastersoft S.R.L.

AS215305 announces 17 IPv4 prefixes covering 5,888 addresses and 0 IPv6 prefixes.

About this network

The AS handle RETZOR-AS is held by Mastersoft S.R.L.

What it's used for

• The address space carries residential and hosting traffic, evidenced by reverse DNS entries such as .datacheap.ru, .retzor.com, and .ispsystem.net.
• The network announces 5888 IPv4 addresses across 17 prefixes with only 3 observed neighbours, a ratio indicative of an access or eyeball network rather than a transit provider.
• Traffic from this AS consists of subscriber eyeballs and web/API endpoints for a Moldovan internet service provider.

Notable

• Registrants align with the announcer, including Mastersoft S.R.L., Retzor-org, and NetArt Group s.r.o. for specific blocks.
• The address inventory is fragmented across multiple /24 and /23 blocks, with some prefixes registered to NetArt Group and others to Mastersoft S.R.L. or Retzor.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 5.180.97.0/24
• 45.81.35.0/24
• 45.151.180.0/24
• 45.151.183.0/24
• 46.8.112.0/23
• 80.66.69.0/24
• 87.251.72.0/24
• 103.112.68.0/22
• 103.118.208.0/23
• 103.119.18.0/23
• 103.200.28.0/24
• 109.248.42.0/24
• 144.48.10.0/24
• 185.245.40.0/24
• 188.130.208.0/24
• 192.145.98.0/24
• 195.78.49.0/24

Upstream networks

• AS48729 ServerKing B.V.
• AS51248 Host-Telecom.com s.r.o.
• AS207083 HOSTSLIM OU

Adjacent networks

• AS48729 ServerKing B.V.
• AS51248 Host-Telecom.com s.r.o.
• AS207083 HOSTSLIM OU

Routing security

• RPKI: 19 valid, 0 invalid and 2 not-found announcements; 23 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 32 route objects.
• Listed in as-sets: AS-HOST-TELECOM-CZ, AS-HOSTSLIM, AS-RETN-ACTUAL-V4, AS215305:AS-SET-RETZOR, AS48729:AS-SERVERKING.