90.183.120.71
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 (20y) +6
- Not on any threat blocklist +5
- Enterprise allocation +4
- Trust score 90 / 100
Experimental · trust-vectors model v1.2.1 — a transparent heuristic, not a definitive verdict. How it works →
DNS records
- Reverse DNS (PTR)
- smtp.dcprague.com
- Forward-confirmed (FCrDNS)
- ✓ Confirmed
- PTR TTL
- 21600 s
- Reverse DNS last checked
- 2026-09-29 04:57 UTC
- Forward DNS last checked
- 2026-09-29 04:57 UTC
Forward DNS records for smtp.dcprague.com
| Type | Value | Priority | TTL |
|---|---|---|---|
| A | 90.183.120.71 | — | 172800s |
Reverse & forward DNS collected by the WorldIP scanner fleet — FCrDNS confirms the PTR hostname resolves back to this IP.
Reverse DNS history
How this IP's reverse DNS (PTR) has changed over time, from our scans.
This IP's reverse DNS changes frequently — the timeline below shows the most recent changes.
- smtp.dcprague.com — Sep 27, 2026 → present
- mx1.dcprague.com — Sep 26, 2026 → Sep 27, 2026
- smtp.dcprague.com — Aug 25, 2026 → Sep 26, 2026
- mx1.dcprague.com — Aug 24, 2026 → Aug 25, 2026
- smtp.dcprague.com — Aug 18, 2026 → Aug 24, 2026
- mx1.dcprague.com — Aug 17, 2026 → Aug 18, 2026
- smtp.dcprague.com — Jul 10, 2026 → Aug 17, 2026
- mx1.dcprague.com — Jul 4, 2026 → Jul 10, 2026
- smtp.dcprague.com — Jun 30, 2026 → Jul 4, 2026
- mx1.dcprague.com — Jun 27, 2026 → Jun 30, 2026
- smtp.dcprague.com — Jun 20, 2026 → Jun 27, 2026
- mx1.dcprague.com — Jun 16, 2026 → Jun 20, 2026
- smtp.dcprague.com — Jun 14, 2026 → Jun 16, 2026
- mx1.dcprague.com — Jun 11, 2026 → Jun 14, 2026
Network Allocation for 90.183.120.71
- CIDR range
- 90.183.112.0/20
- IP range (int)
- 1,521,971,200 — 1,521,975,295
- Prefix length
- /20
- Organization
- O2 Czech Republic, a.s.
- ASN
- AS5610
- ASN name
- O2 Czech Republic, a.s.
- Location
- Prague, Prague, Czechia
- Coordinates
- 50.076600, 14.446400
- Accuracy radius
- 100 km
- Postal code
- 120 00
- Regional Internet Registry
- RIPE
- Allocated
- 2006-09-17
- Data source(s)
- maxmind_city, maxmind_country, maxmind_asn, ipinfo_lite
- Last updated
- 2026-09-29 04:07:30
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 90.183.120.71?
90.183.120.71 is allocated to O2 Czech Republic, a.s. (AS5610), registered in Prague, Czechia.
Where is 90.183.120.71 located?
The geolocation for 90.183.120.71 maps to Prague, 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 90.183.120.71 on?
90.183.120.71 belongs to the 90.183.112.0/20 network block announced by AS5610. This range contains 4,096 addresses.
Does 90.183.120.71 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.
