51.155.199.1
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 (33y) +6
- Not on any threat blocklist +5
- Has a reverse-DNS (PTR) record +5
- Isp allocation +5
- Trust score 86 / 100
Experimental · trust-vectors model v1.2.1 — a transparent heuristic, not a definitive verdict. How it works →
DNS records
- Reverse DNS (PTR)
- 51-155-199-1.dsl.in-addr.zen.co.uk
- Forward-confirmed (FCrDNS)
- ✗ Mismatch
- PTR TTL
- 86400 s
- Reverse DNS last checked
- 2026-09-29 03:41 UTC
- Forward DNS last checked
- 2026-09-29 03:41 UTC
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.
Reverse-DNS changes between Sep 28, 2026 and Sep 29, 2026 were not recorded; the current PTR is shown from its earliest retained observation.
- 51-155-199-1.dsl.in-addr.zen.co.uk — since at least Sep 29, 2026 → present
- no PTR — Sep 28, 2026 → Sep 29, 2026
- 51-155-199-1.dsl.in-addr.zen.co.uk stable — Jun 13, 2026 → Sep 28, 2026
Network Allocation for 51.155.199.1
- CIDR range
- 51.155.192.0/20
- IP range (int)
- 865,845,248 — 865,849,343
- Prefix length
- /20
- Organization
- Zen Internet Ltd
- ASN
- AS13037
- ASN name
- Zen Internet Ltd
- Location
- Camden, England, United Kingdom
- Coordinates
- 51.541500, -0.144500
- Accuracy radius
- 200 km
- Postal code
- NW1
- Regional Internet Registry
- RIPE
- Allocated
- 1993-09-01
- Data source(s)
- maxmind_city, maxmind_country, maxmind_asn, ipinfo_lite
- Last updated
- 2026-09-29 04:05:37
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 51.155.199.1?
51.155.199.1 is allocated to Zen Internet Ltd (AS13037), registered in Camden, United Kingdom.
Where is 51.155.199.1 located?
The geolocation for 51.155.199.1 maps to Camden, United Kingdom 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 51.155.199.1 on?
51.155.199.1 belongs to the 51.155.192.0/20 network block announced by AS13037. This range contains 4,096 addresses.
Does 51.155.199.1 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.
