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CIDR
/23 · 512 IPs
ASN
O2 Czech Republic, a.s.
Reverse DNS
90-183-142-241.rcq.o2.cz
last known PTR from 45 min ago
Blocklisted
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Reputation · trust score

A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.

85/100
Trusted
How this score is built

Experimental · trust-vectors model v1.2.1 — a transparent heuristic, not a definitive verdict. How it works →

Reverse DNS history

How this IP's reverse DNS (PTR) has changed over time, from our scans.

Reverse-DNS changes between Jun 11, 2026 and Oct 3, 2026 were not recorded; the current PTR is shown from its earliest retained observation.

  1. no PTR — since at least Oct 3, 2026 → present
  2. 90-183-142-241.rcq.o2.cz stable — Jun 11, 2026 → Oct 3, 2026

Network Allocation for 90.183.142.241

CIDR range
90.183.142.0/23
IP range (int)
1,521,978,880 — 1,521,979,391
Prefix length
/23
Organization
O2 Czech Republic, a.s.
ASN
AS5610
ASN name
O2 Czech Republic, a.s.
Location
Třebechovice pod Orebem, Hradec Kr Lov Region, Czechia
Coordinates
50.199000, 15.990000
Accuracy radius
50 km
Postal code
503 46
Regional Internet Registry
RIPE
Allocated
2006-09-17
Data source(s)
maxmind_city, maxmind_country, maxmind_asn, ipinfo_lite
Last updated
2026-10-03 05:23:09

Origin AS announcing the most-specific prefix that covers this IP, observed across our RIPE RIS collectors.

Announced prefix
Origin AS
Announcement samples
28,032
Last seen
2026-10-03 16:37:13

Frequently Asked Questions

Who owns 90.183.142.241?

90.183.142.241 is allocated to O2 Czech Republic, a.s. (AS5610), registered in Třebechovice pod Orebem, Czechia.

Where is 90.183.142.241 located?

The geolocation for 90.183.142.241 maps to Třebechovice pod Orebem, Czechia based on MaxMind GeoLite2 data. Accuracy depends on the provider and may represent the ISP's regional hub rather than the exact endpoint.

What network is 90.183.142.241 on?

90.183.142.241 belongs to the 90.183.142.0/23 network block announced by AS5610. This range contains 512 addresses.

Does 90.183.142.241 have a reverse DNS record?

Reverse DNS (PTR) records are resolved live when you visit this page. If a PTR record exists, it appears in the Reverse DNS field above. PTR records map IP addresses back to hostnames and are commonly used for email authentication and network diagnostics.

Neighbors

Other addresses in the same /24.

Related

Last updated: 2026-10-03 10:36:28 UTC
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