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IPv4 Address

61.56.4.61

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
edsmap1.ncdr.nat.gov.tw
Last scanned 2 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.

81/100
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)
edsmap1.ncdr.nat.gov.tw
Forward-confirmed (FCrDNS)
Not checked
PTR TTL
60 s
Reverse DNS last checked
2026-10-23 00:03 UTC
Forward DNS last checked
2026-10-23 00:03 UTC

Forward DNS records for edsmap1.ncdr.nat.gov.tw

TypeValuePriorityTTL
A 140.110.19.225 — 60s
A 61.56.4.61 — 60s
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.

  1. edsmap1.ncdr.nat.gov.tw — Oct 21, 2026 → present
  2. ieoc.ncdr.nat.gov.tw — Oct 21, 2026 → Oct 21, 2026
  3. eocmobile.ncdr.nat.gov.tw — Oct 20, 2026 → Oct 21, 2026
  4. edsmap1.ncdr.nat.gov.tw — Oct 20, 2026 → Oct 20, 2026
  5. eocdss.ncdr.nat.gov.tw — Oct 19, 2026 → Oct 20, 2026
  6. edsmap1.ncdr.nat.gov.tw — Oct 19, 2026 → Oct 19, 2026
  7. eocmobile.ncdr.nat.gov.tw — Oct 18, 2026 → Oct 19, 2026
  8. edsmap1.ncdr.nat.gov.tw — Oct 18, 2026 → Oct 18, 2026
  9. ieoc.ncdr.nat.gov.tw — Oct 17, 2026 → Oct 18, 2026
  10. edsmap1.ncdr.nat.gov.tw — Oct 17, 2026 → Oct 17, 2026
  11. eocdss.ncdr.nat.gov.tw — Oct 17, 2026 → Oct 17, 2026
  12. edsmap1.ncdr.nat.gov.tw — Oct 17, 2026 → Oct 17, 2026
  13. ieoc.ncdr.nat.gov.tw — Oct 16, 2026 → Oct 17, 2026
  14. edsmap1.ncdr.nat.gov.tw — Oct 16, 2026 → Oct 16, 2026
  15. ieoc.ncdr.nat.gov.tw — Oct 16, 2026 → Oct 16, 2026
  16. eocmobile.ncdr.nat.gov.tw — Oct 15, 2026 → Oct 16, 2026
  17. ieoc.ncdr.nat.gov.tw — Oct 15, 2026 → Oct 15, 2026
  18. eocmobile.ncdr.nat.gov.tw — Oct 14, 2026 → Oct 15, 2026
  19. eocdss.ncdr.nat.gov.tw — Oct 14, 2026 → Oct 14, 2026
  20. edsmap1.ncdr.nat.gov.tw — Oct 13, 2026 → Oct 14, 2026
  21. eocmobile.ncdr.nat.gov.tw — Oct 12, 2026 → Oct 13, 2026
  22. eocdss.ncdr.nat.gov.tw — Oct 12, 2026 → Oct 12, 2026
  23. edsmap1.ncdr.nat.gov.tw — Oct 10, 2026 → Oct 12, 2026
  24. eocdss.ncdr.nat.gov.tw — Oct 10, 2026 → Oct 10, 2026
  25. ieoc.ncdr.nat.gov.tw — Oct 10, 2026 → Oct 10, 2026
  26. edsmap1.ncdr.nat.gov.tw — Oct 9, 2026 → Oct 10, 2026
  27. ieoc.ncdr.nat.gov.tw — Oct 9, 2026 → Oct 9, 2026
  28. edsmap1.ncdr.nat.gov.tw — Oct 8, 2026 → Oct 9, 2026
  29. ieoc.ncdr.nat.gov.tw — Oct 8, 2026 → Oct 8, 2026
  30. edsmap1.ncdr.nat.gov.tw — Oct 7, 2026 → Oct 8, 2026
  31. eocmobile.ncdr.nat.gov.tw — Oct 7, 2026 → Oct 7, 2026
  32. ieoc.ncdr.nat.gov.tw — Oct 7, 2026 → Oct 7, 2026
  33. eocmobile.ncdr.nat.gov.tw — Oct 6, 2026 → Oct 7, 2026
  34. eocdss.ncdr.nat.gov.tw — Oct 6, 2026 → Oct 6, 2026
  35. ieoc.ncdr.nat.gov.tw — Oct 5, 2026 → Oct 6, 2026
  36. eocmobile.ncdr.nat.gov.tw — Oct 5, 2026 → Oct 5, 2026
  37. eocdss.ncdr.nat.gov.tw — Oct 5, 2026 → Oct 5, 2026
  38. edsmap1.ncdr.nat.gov.tw — Oct 4, 2026 → Oct 5, 2026
  39. eocdss.ncdr.nat.gov.tw — Oct 4, 2026 → Oct 4, 2026
  40. eocmobile.ncdr.nat.gov.tw — Oct 4, 2026 → Oct 4, 2026
  41. eocdss.ncdr.nat.gov.tw — Oct 3, 2026 → Oct 4, 2026
  42. ieoc.ncdr.nat.gov.tw — Oct 2, 2026 → Oct 3, 2026
  43. edsmap1.ncdr.nat.gov.tw — Oct 2, 2026 → Oct 2, 2026
  44. ieoc.ncdr.nat.gov.tw — Oct 2, 2026 → Oct 2, 2026
  45. eocmobile.ncdr.nat.gov.tw — Oct 1, 2026 → Oct 2, 2026
  46. ieoc.ncdr.nat.gov.tw — Oct 1, 2026 → Oct 1, 2026
  47. eocdss.ncdr.nat.gov.tw — Sep 30, 2026 → Oct 1, 2026
  48. ieoc.ncdr.nat.gov.tw — Sep 30, 2026 → Sep 30, 2026
  49. edsmap1.ncdr.nat.gov.tw — Sep 30, 2026 → Sep 30, 2026
  50. eocmobile.ncdr.nat.gov.tw — Sep 29, 2026 → Sep 30, 2026
  51. edsmap1.ncdr.nat.gov.tw — Sep 29, 2026 → Sep 29, 2026
  52. eocmobile.ncdr.nat.gov.tw — Sep 29, 2026 → Sep 29, 2026
  53. ieoc.ncdr.nat.gov.tw — Sep 28, 2026 → Sep 29, 2026
  54. eocdss.ncdr.nat.gov.tw — Sep 28, 2026 → Sep 28, 2026
  55. edsmap1.ncdr.nat.gov.tw — Sep 27, 2026 → Sep 28, 2026
  56. ieoc.ncdr.nat.gov.tw — Sep 27, 2026 → Sep 27, 2026
  57. edsmap1.ncdr.nat.gov.tw — Sep 26, 2026 → Sep 27, 2026
  58. eocmobile.ncdr.nat.gov.tw — Sep 25, 2026 → Sep 26, 2026
  59. edsmap1.ncdr.nat.gov.tw — Aug 18, 2026 → Sep 25, 2026
  60. eocdss.ncdr.nat.gov.tw — Jul 5, 2026 → Aug 18, 2026
  61. eocmobile.ncdr.nat.gov.tw — Jul 2, 2026 → Jul 5, 2026
  62. eocdss.ncdr.nat.gov.tw — Jul 1, 2026 → Jul 2, 2026
  63. eocmobile.ncdr.nat.gov.tw — Jun 27, 2026 → Jul 1, 2026
  64. edsmap1.ncdr.nat.gov.tw — Jun 27, 2026 → Jun 27, 2026
  65. eocdss.ncdr.nat.gov.tw — Jun 23, 2026 → Jun 27, 2026
  66. edsmap1.ncdr.nat.gov.tw — Jun 19, 2026 → Jun 23, 2026
  67. ieoc.ncdr.nat.gov.tw — Jun 16, 2026 → Jun 19, 2026
  68. docs.ieoc.ncdr.nat.gov.tw — Jun 14, 2026 → Jun 16, 2026
  69. eocmobile.ncdr.nat.gov.tw — Jun 11, 2026 → Jun 14, 2026

Network Allocation for 61.56.4.61

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
50,363
Last seen
2026-10-23 02:06:17

Frequently Asked Questions

Who owns 61.56.4.61?

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

Where is 61.56.4.61 located?

The geolocation for 61.56.4.61 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 61.56.4.61 on?

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

Does 61.56.4.61 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.

61.56.4.53 61.56.4.54 61.56.4.55 61.56.4.56 61.56.4.57 61.56.4.58 61.56.4.59 61.56.4.60 61.56.4.62 61.56.4.63 61.56.4.64 61.56.4.65 61.56.4.66 61.56.4.67 61.56.4.68 61.56.4.69 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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