202.175.3.138

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 (31y) +6
• Not on any threat blocklist +5
• Isp allocation +5
• Trust score 91 / 100

Experimental · trust-vectors model v1.3.0 — a transparent heuristic, not a definitive verdict. How it works →

DNS records

Reverse DNS (PTR)

ndns3-spare-s.macau.ctm.net

Forward-confirmed (FCrDNS)

✓ Confirmed

PTR TTL

86400 s

Reverse DNS last checked

2026-10-31 15:31 UTC

Forward DNS last checked

2026-10-31 15:31 UTC

Forward DNS records for ndns3-spare-s.macau.ctm.net

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.

Reverse-DNS changes between Oct 30, 2026 and Oct 31, 2026 were not recorded; the current PTR is shown from its earliest retained observation.

1. ndns3-spare-s.macau.ctm.net — since at least Oct 31, 2026 → present
2. hsi3.macau.ctm.net — Oct 30, 2026 → Oct 31, 2026
3. ndns3-spare-new.macau.ctm.net — Oct 29, 2026 → Oct 30, 2026
4. hsi3.macau.ctm.net — Oct 29, 2026 → Oct 29, 2026
5. ndns3-spare-new.macau.ctm.net — Oct 28, 2026 → Oct 29, 2026
6. ndns3-spare-s.macau.ctm.net — Oct 27, 2026 → Oct 28, 2026
7. ndns3-spare-new.macau.ctm.net — Oct 27, 2026 → Oct 27, 2026
8. ndns3-spare-s.macau.ctm.net — Oct 26, 2026 → Oct 27, 2026
9. ndns3-spare-new.macau.ctm.net — Oct 26, 2026 → Oct 26, 2026
10. hsi3.macau.ctm.net — Oct 26, 2026 → Oct 26, 2026
11. ndns3-spare-s.macau.ctm.net — Oct 25, 2026 → Oct 26, 2026
12. ndns3-spare-new.macau.ctm.net — Oct 24, 2026 → Oct 25, 2026
13. hsi3.macau.ctm.net — Oct 24, 2026 → Oct 24, 2026
14. ndns3-spare-new.macau.ctm.net — Oct 24, 2026 → Oct 24, 2026
15. ndns3-spare-s.macau.ctm.net — Oct 23, 2026 → Oct 24, 2026
16. ndns3-spare-new.macau.ctm.net — Oct 22, 2026 → Oct 23, 2026
17. ndns3-spare-s.macau.ctm.net — Oct 21, 2026 → Oct 22, 2026
18. ndns3-spare-new.macau.ctm.net — Oct 20, 2026 → Oct 21, 2026
19. hsi3.macau.ctm.net — Oct 19, 2026 → Oct 20, 2026
20. ndns3-spare-s.macau.ctm.net — Oct 19, 2026 → Oct 19, 2026
21. ndns3-spare-new.macau.ctm.net — Oct 18, 2026 → Oct 19, 2026
22. ndns3-spare-s.macau.ctm.net — Oct 18, 2026 → Oct 18, 2026
23. hsi3.macau.ctm.net — Oct 17, 2026 → Oct 18, 2026
24. ndns3-spare-new.macau.ctm.net — Oct 16, 2026 → Oct 17, 2026
25. hsi3.macau.ctm.net — Oct 16, 2026 → Oct 16, 2026
26. ndns3-spare-new.macau.ctm.net — Oct 16, 2026 → Oct 16, 2026
27. hsi3.macau.ctm.net — Oct 16, 2026 → Oct 16, 2026
28. ndns3-spare-s.macau.ctm.net — Oct 15, 2026 → Oct 16, 2026
29. hsi3.macau.ctm.net — Oct 15, 2026 → Oct 15, 2026
30. ndns3-spare-s.macau.ctm.net — Oct 13, 2026 → Oct 15, 2026
31. hsi3.macau.ctm.net — Oct 12, 2026 → Oct 13, 2026
32. ndns3-spare-s.macau.ctm.net — Oct 11, 2026 → Oct 12, 2026
33. hsi3.macau.ctm.net — Oct 11, 2026 → Oct 11, 2026
34. ndns3-spare-s.macau.ctm.net — Oct 8, 2026 → Oct 11, 2026
35. hsi3.macau.ctm.net — Oct 7, 2026 → Oct 8, 2026
36. ndns3-spare.macau.ctm.net — Oct 7, 2026 → Oct 7, 2026
37. hsi3.macau.ctm.net — Oct 7, 2026 → Oct 7, 2026
38. ndns3-spare-s.macau.ctm.net — Oct 6, 2026 → Oct 7, 2026
39. ndns3-spare.macau.ctm.net — Oct 5, 2026 → Oct 6, 2026
40. hsi3.macau.ctm.net — Oct 4, 2026 → Oct 5, 2026
41. ndns3-spare-s.macau.ctm.net — Oct 4, 2026 → Oct 4, 2026
42. ndns3-spare.macau.ctm.net — Oct 4, 2026 → Oct 4, 2026
43. ndns3-spare-s.macau.ctm.net — Oct 4, 2026 → Oct 4, 2026
44. ndns3-spare.macau.ctm.net — Oct 3, 2026 → Oct 4, 2026
45. ndns3-spare-s.macau.ctm.net — Oct 3, 2026 → Oct 3, 2026
46. hsi3.macau.ctm.net — Oct 2, 2026 → Oct 3, 2026
47. ndns3-spare-s.macau.ctm.net — Oct 2, 2026 → Oct 2, 2026
48. ndns3-spare.macau.ctm.net — Oct 2, 2026 → Oct 2, 2026
49. hsi3.macau.ctm.net — Oct 1, 2026 → Oct 2, 2026
50. ndns3-spare.macau.ctm.net — Oct 1, 2026 → Oct 1, 2026
51. no PTR — Sep 30, 2026 → Oct 1, 2026
52. ndns3-spare-s.macau.ctm.net — Sep 30, 2026 → Sep 30, 2026
53. ndns3-spare.macau.ctm.net — Sep 28, 2026 → Sep 30, 2026
54. ndns3-spare-s.macau.ctm.net — Sep 28, 2026 → Sep 28, 2026
55. hsi3.macau.ctm.net — Sep 27, 2026 → Sep 28, 2026
56. ndns3-spare.macau.ctm.net — Sep 27, 2026 → Sep 27, 2026
57. ndns3-spare-s.macau.ctm.net — Sep 26, 2026 → Sep 27, 2026
58. ndns3-spare.macau.ctm.net — Aug 25, 2026 → Sep 26, 2026
59. ndns3-spare-s.macau.ctm.net — Aug 24, 2026 → Aug 25, 2026
60. hsi3.macau.ctm.net — Aug 19, 2026 → Aug 24, 2026
61. ndns3-spare-s.macau.ctm.net — Jul 7, 2026 → Aug 19, 2026
62. ndns3-spare.macau.ctm.net — Jul 3, 2026 → Jul 7, 2026
63. hsi3.macau.ctm.net — Jun 29, 2026 → Jul 3, 2026
64. ndns3-spare.macau.ctm.net — Jun 25, 2026 → Jun 29, 2026
65. ndns3-spare-s.macau.ctm.net — Jun 13, 2026 → Jun 25, 2026

Network Allocation for 202.175.3.138

CIDR range

202.175.2.0/23

IP range (int)

3,400,466,944 — 3,400,467,455

Prefix length

/23

Organization

Companhia de Telecomunicacoes de Macau SARL

ASN

AS4609

ASN name

Companhia de Telecomunicacoes de Macau SARL

Location

Macao

Coordinates

22.159200, 113.563800

Accuracy radius

5 km

Regional Internet Registry

APNIC

Allocated

1995-03-18

Data source(s)

ipinfo_lite, maxmind_city, maxmind_country, maxmind_asn

Last updated

2026-10-28 08:49:51

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

Neighbors

Other addresses in the same /24.