81.90.170.227
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
- Forward-confirmed reverse DNS (FCrDNS) +10
- Long-established allocation (24y) +6
- Not on any threat blocklist +5
- Trust score 86 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
DNS records
- Reverse DNS (PTR)
- 81-90-170-227.ria.o2.cz
- Forward-confirmed (FCrDNS)
- ✓ Confirmed
- PTR TTL
- 300 s
- Reverse DNS last checked
- 2026-07-24 17:20 UTC
- Forward DNS last checked
- 2026-07-24 17:20 UTC
Forward DNS records for 81-90-170-227.ria.o2.cz
| Type | Value | Priority | TTL |
|---|---|---|---|
| A | 81.90.170.227 | — | 172800s |
Reverse & forward DNS collected by the WorldIP scanner fleet — FCrDNS confirms the PTR hostname resolves back to this IP.
Network Allocation for 81.90.170.227
- CIDR range
- 81.90.168.0/22
- IP range (int)
- 1,364,895,744 — 1,364,896,767
- Prefix length
- /22
- Organization
- O2 Czech Republic, a.s.
- ASN
- AS5610
- ASN name
- O2 Czech Republic, a.s.
- Location
- České Budějovice, South Bohemian Region, Czechia
- Coordinates
- 48.920800, 14.464900
- Accuracy radius
- 20 km
- Postal code
- 370 05
- Regional Internet Registry
- RIPE
- Allocated
- 2002-07-04
- Data source(s)
- maxmind_city, maxmind_country, maxmind_asn, ipinfo_lite
- Last updated
- 2026-07-21 04:07:00
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 81.90.170.227?
81.90.170.227 is allocated to O2 Czech Republic, a.s. (AS5610), registered in České Budějovice, Czechia.
Where is 81.90.170.227 located?
The geolocation for 81.90.170.227 maps to České Budějovice, 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 81.90.170.227 on?
81.90.170.227 belongs to the 81.90.168.0/22 network block announced by AS5610. This range contains 1,024 addresses.
Does 81.90.170.227 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.
