81.200.53.136
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.
- Baseline (neutral) 65
- Long-established allocation (20y) +6
- Not on any threat blocklist +5
- Has a reverse-DNS (PTR) record +5
- Enterprise allocation +4
- Trust score 85 / 100
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 1, 2026 were not recorded; the current PTR is shown from its earliest retained observation.
- no PTR — since at least Oct 1, 2026 → present
- host-81-200-53-136.ip.nej.cz stable — Jun 11, 2026 → Oct 1, 2026
Network Allocation for 81.200.53.136
- CIDR range
- 81.200.48.0/20
- IP range (int)
- 1,372,073,984 — 1,372,078,079
- Prefix length
- /20
- Organization
- O2 Czech Republic, a.s.
- ASN
- AS41046
- ASN name
- O2 Czech Republic, a.s.
- Location
- Třinec, Moravian Silesian Region, Czechia
- Coordinates
- 49.618400, 18.655500
- Accuracy radius
- 20 km
- Postal code
- 739 61
- Regional Internet Registry
- RIPE
- Allocated
- 2006-06-01
- Data source(s)
- maxmind_city, maxmind_country, maxmind_asn, ipinfo_lite
- Last updated
- 2026-09-30 05:22:51
BGP Routing
Live BGP anomalies →Origin AS announcing the most-specific prefix that covers this IP, observed across our RIPE RIS collectors.
Frequently Asked Questions
Who owns 81.200.53.136?
81.200.53.136 is allocated to O2 Czech Republic, a.s. (AS41046), registered in Třinec, Czechia.
Where is 81.200.53.136 located?
The geolocation for 81.200.53.136 maps to Třinec, 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 81.200.53.136 on?
81.200.53.136 belongs to the 81.200.48.0/20 network block announced by AS41046. This range contains 4,096 addresses.
Does 81.200.53.136 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.
