211.251.239.15

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 (26y) +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)

mail.o-pen.tv

Forward-confirmed (FCrDNS)

Not checked

PTR TTL

43200 s

Reverse DNS last checked

2026-10-04 00:32 UTC

Forward DNS last checked

2026-10-03 09:03 UTC

Reverse & forward DNS collected by the WorldIP scanner fleet — FCrDNS confirms the PTR hostname resolves back to this IP.

Hosted domains

Domains GRIP observed with an A record pointing to this IP — a forward-DNS view that complements the reverse (PTR) records above.

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.

Reverse-DNS changes between Oct 3, 2026 and Oct 4, 2026 were not recorded; the current PTR is shown from its earliest retained observation.

1. mail.o-pen.tv — since at least Oct 4, 2026 → present
2. o-pen.tv — Oct 3, 2026 → Oct 4, 2026
3. mail.o-pen.tv — Oct 1, 2026 → Oct 3, 2026
4. o-pen.tv — Sep 30, 2026 → Oct 1, 2026
5. mail.o-pen.tv — Sep 30, 2026 → Sep 30, 2026
6. o-pen.tv — Sep 29, 2026 → Sep 30, 2026
7. mail.o-pen.tv — Sep 28, 2026 → Sep 29, 2026
8. o-pen.tv — Sep 27, 2026 → Sep 28, 2026
9. mail.o-pen.tv — Sep 27, 2026 → Sep 27, 2026
10. o-pen.tv — Aug 25, 2026 → Sep 27, 2026
11. mail.o-pen.tv — Aug 18, 2026 → Aug 25, 2026
12. o-pen.tv — Jun 13, 2026 → Aug 18, 2026
13. mail.o-pen.tv — Jun 10, 2026 → Jun 13, 2026

Network Allocation for 211.251.239.15

CIDR range

211.251.224.0/20

IP range (int)

3,556,499,456 — 3,556,503,551

Prefix length

/20

Organization

Korea Telecom

ASN

AS4766

ASN name

Korea Telecom

Location

Anyang-si, Gyeonggi Do, South Korea

Coordinates

37.390700, 126.916700

Accuracy radius

10 km

Postal code

14032

Regional Internet Registry

APNIC

Allocated

2000-09-08

Data source(s)

maxmind_city, maxmind_asn, ipinfo_lite, maxmind_country

Last updated

2026-10-03 08:49:49

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

Allocation changes captured from regional internet registry (RIR) delegation files, re-imported every six hours, for ranges that have contained this IP.

See the full history for 211.224.0.0/11.

Neighbors

Other addresses in the same /24.