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IPv4 Address

61.56.4.159

National Center for Research on Earthquake Engineering AS18183 · National Center for Research on Earthquake Engineering Taiwan APNIC
Within
61.56.0.0/13
CIDR
61.56.0.0/20
/20 · 4.1K IPs
ASN
AS18183
National Center for Research on Earthquake Engineering
Reverse DNS
neip.ncdr.nat.gov.tw
Last scanned 7 hr ago
Blocklisted
Checking…
Scanning blocklists

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.

86/100
Trusted
How this score is built

Experimental · trust-vectors model v1.2.1 — a transparent heuristic, not a definitive verdict. How it works →

DNS records

Reverse DNS (PTR)
neip.ncdr.nat.gov.tw
Forward-confirmed (FCrDNS)
✓ Confirmed
PTR TTL
60 s
Reverse DNS last checked
2026-10-23 00:02 UTC
Forward DNS last checked
2026-10-23 00:02 UTC

Forward DNS records for neip.ncdr.nat.gov.tw

TypeValuePriorityTTL
A 61.56.4.159 — 172800s
MX ms2.ncdr.nat.gov.tw 10 —
NS gslbncree.ncdr.nat.gov.tw — —
every IP & sub-domain we've seen under this domain

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

Domains hosted

as of 2026-10-18 UTC

0

issued.live's latest DNS data shows no domain resolving to this IP.

Domain data provided by issued.live — for full details visit https://issued.live/pricing

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 21, 2026 and Oct 23, 2026 were not recorded; the current PTR is shown from its earliest retained observation.

  1. neip.ncdr.nat.gov.tw — since at least Oct 23, 2026 → present
  2. aicctv.ncdr.nat.gov.tw — Oct 21, 2026 → Oct 23, 2026
  3. neip.ncdr.nat.gov.tw — Oct 21, 2026 → Oct 21, 2026
  4. aicctv.ncdr.nat.gov.tw — Oct 19, 2026 → Oct 21, 2026
  5. neip.ncdr.nat.gov.tw — Oct 19, 2026 → Oct 19, 2026
  6. aicctv.ncdr.nat.gov.tw — Oct 18, 2026 → Oct 19, 2026
  7. neip.ncdr.nat.gov.tw — Oct 18, 2026 → Oct 18, 2026
  8. aicctv.ncdr.nat.gov.tw — Oct 17, 2026 → Oct 18, 2026
  9. neip.ncdr.nat.gov.tw — Oct 16, 2026 → Oct 17, 2026
  10. aicctv.ncdr.nat.gov.tw — Oct 15, 2026 → Oct 16, 2026
  11. neip.ncdr.nat.gov.tw — Oct 15, 2026 → Oct 15, 2026
  12. aicctv.ncdr.nat.gov.tw — Oct 15, 2026 → Oct 15, 2026
  13. neip.ncdr.nat.gov.tw — Oct 14, 2026 → Oct 15, 2026
  14. aicctv.ncdr.nat.gov.tw — Oct 14, 2026 → Oct 14, 2026
  15. neip.ncdr.nat.gov.tw — Oct 13, 2026 → Oct 14, 2026
  16. aicctv.ncdr.nat.gov.tw — Oct 11, 2026 → Oct 13, 2026
  17. neip.ncdr.nat.gov.tw — Oct 10, 2026 → Oct 11, 2026
  18. aicctv.ncdr.nat.gov.tw — Oct 9, 2026 → Oct 10, 2026
  19. neip.ncdr.nat.gov.tw — Oct 8, 2026 → Oct 9, 2026
  20. aicctv.ncdr.nat.gov.tw — Oct 7, 2026 → Oct 8, 2026
  21. neip.ncdr.nat.gov.tw — Oct 5, 2026 → Oct 7, 2026
  22. aicctv.ncdr.nat.gov.tw — Oct 4, 2026 → Oct 5, 2026
  23. neip.ncdr.nat.gov.tw — Oct 3, 2026 → Oct 4, 2026
  24. aicctv.ncdr.nat.gov.tw — Oct 1, 2026 → Oct 3, 2026
  25. neip.ncdr.nat.gov.tw — Sep 30, 2026 → Oct 1, 2026
  26. aicctv.ncdr.nat.gov.tw — Sep 30, 2026 → Sep 30, 2026
  27. neip.ncdr.nat.gov.tw — Sep 29, 2026 → Sep 30, 2026
  28. aicctv.ncdr.nat.gov.tw — Aug 24, 2026 → Sep 29, 2026
  29. neip.ncdr.nat.gov.tw — Aug 18, 2026 → Aug 24, 2026
  30. aicctv.ncdr.nat.gov.tw — Jul 5, 2026 → Aug 18, 2026
  31. neip.ncdr.nat.gov.tw — Jul 1, 2026 → Jul 5, 2026
  32. aicctv.ncdr.nat.gov.tw — Jun 27, 2026 → Jul 1, 2026
  33. neip.ncdr.nat.gov.tw — Jun 16, 2026 → Jun 27, 2026
  34. aicctv.ncdr.nat.gov.tw — Jun 12, 2026 → Jun 16, 2026

Network Allocation for 61.56.4.159

CIDR range
61.56.0.0/20
IP range (int)
1,027,080,192 — 1,027,084,287
Prefix length
/20
Organization
National Center for Research on Earthquake Engineering
ASN
AS18183
ASN name
National Center for Research on Earthquake Engineering
Location
Taiwan
Coordinates
24.000000, 121.000000
Accuracy radius
200 km
Regional Internet Registry
APNIC
Allocated
2001-02-21
Data source(s)
maxmind_asn, ipinfo_lite, maxmind_city, maxmind_country
Last updated
2026-10-22 08:43:05

BGP Routing

Live BGP anomalies →

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

Announced prefix
61.56.4.0/24
Origin AS
AS18183
Announcement samples
50,369
Last seen
2026-10-23 06:31:03

Frequently Asked Questions

Who owns 61.56.4.159?

61.56.4.159 is allocated to National Center for Research on Earthquake Engineering (AS18183), registered in Taiwan.

Where is 61.56.4.159 located?

The geolocation for 61.56.4.159 maps to Taiwan 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 61.56.4.159 on?

61.56.4.159 belongs to the 61.56.0.0/20 network block announced by AS18183. This range contains 4,096 addresses.

Does 61.56.4.159 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.

61.56.4.151 61.56.4.152 61.56.4.153 61.56.4.154 61.56.4.155 61.56.4.156 61.56.4.157 61.56.4.158 61.56.4.160 61.56.4.161 61.56.4.162 61.56.4.163 61.56.4.164 61.56.4.165 61.56.4.166 61.56.4.167 See all in 61.56.0.0/13 →

Related

/24 neighborhood /16 block /8 block All AS18183 ranges All National Center for Research on Earthquake Engineering ranges All Taiwan IPs
Last updated: 2026-10-23 02:34:15 UTC
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