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CIDR
/21 · 2.0K IPs
ASN
University of Puerto Rico
Reverse DNS
ciam-189073
Last scanned 16 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 v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →

DNS records

Reverse DNS (PTR)
ciam-189073
Forward-confirmed (FCrDNS)
Not checked
PTR TTL
900 s
Reverse DNS last checked
2026-09-10 05:10 UTC

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

Network Allocation for 136.145.188.164

CIDR range
136.145.184.0/21
IP range (int)
2,291,251,200 — 2,291,253,247
Prefix length
/21
Organization
University of Puerto Rico
ASN
AS5786
ASN name
University of Puerto Rico
Location
San Juan, Puerto Rico
Coordinates
18.472300, -66.105200
Accuracy radius
10 km
Postal code
00923
Regional Internet Registry
ARIN
Allocated
1989-08-29
Data source(s)
maxmind_city, maxmind_country, maxmind_asn, ipinfo_lite
Last updated
2026-09-08 04:07:45

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

Announced prefix
Origin AS
Announcement samples
28,082
Last seen
2026-09-10 21:06:58

Frequently Asked Questions

Who owns 136.145.188.164?

136.145.188.164 is allocated to University of Puerto Rico (AS5786), registered in San Juan, Puerto Rico.

Where is 136.145.188.164 located?

The geolocation for 136.145.188.164 maps to San Juan, Puerto Rico 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 136.145.188.164 on?

136.145.188.164 belongs to the 136.145.184.0/21 network block announced by AS5786. This range contains 2,048 addresses.

Does 136.145.188.164 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: 2026-09-10 21:18:57 UTC
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