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CIDR
/20 · 4.1K IPs
ASN
Sai gon Postel Corporation
Reverse DNS
No PTR record
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.

80/100
Trusted
How this score is built

Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →

Network Allocation for 221.133.4.47

CIDR range
221.133.0.0/20
IP range (int)
3,716,481,024 — 3,716,485,119
Prefix length
/20
Organization
Sai gon Postel Corporation
ASN
AS7602
ASN name
Sai gon Postel Corporation
Location
Vietnam
Coordinates
16.166700, 107.833300
Accuracy radius
1000 km
Regional Internet Registry
APNIC
Allocated
2003-08-06
Data source(s)
maxmind_asn, maxmind_city, maxmind_country, ipinfo_lite
Last updated
2026-07-21 04:29:57

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

Announced prefix
Origin AS
Announcement samples
40,024
Last seen
2026-07-24 20:36:25

Frequently Asked Questions

Who owns 221.133.4.47?

221.133.4.47 is allocated to Sai gon Postel Corporation (AS7602), registered in Vietnam.

Where is 221.133.4.47 located?

The geolocation for 221.133.4.47 maps to Vietnam 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 221.133.4.47 on?

221.133.4.47 belongs to the 221.133.0.0/20 network block announced by AS7602. This range contains 4,096 addresses.

Does 221.133.4.47 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.

Related

Last updated: 2026-07-24 21:35:06 UTC
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