146.189.64.147
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
- Long-established allocation (35y) +6
- Not on any threat blocklist +5
- Has a reverse-DNS (PTR) record +5
- Trust score 81 / 100
Experimental · trust-vectors model v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →
DNS records
- Reverse DNS (PTR)
- ummsaz-pf66en15.ad.umassmed.edu
- Forward-confirmed (FCrDNS)
- Not checked
- PTR TTL
- 86400 s
- Reverse DNS last checked
- 2026-06-15 13:02 UTC
- Forward DNS last checked
- 2026-06-15 13:02 UTC
Forward DNS records for ummsaz-pf66en15.ad.umassmed.edu
| Type | Value | Priority | TTL |
|---|---|---|---|
| A | 172.17.86.227 | — | 172800s |
| TXT | 31bdb5f1439e509ac7be667a549bb3044e | — | — |
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.
- no PTR — Jun 14, 2026 → present
- ummsaz-pf66en15.ad.umassmed.edu stable — Jun 13, 2026 → Jun 14, 2026
Network Allocation for 146.189.64.147
- CIDR range
- 146.189.64.0/20
- IP range (int)
- 2,461,876,224 — 2,461,880,319
- Prefix length
- /20
- Organization
- University of Massachusetts Medical School
- ASN
- AS5724
- ASN name
- University of Massachusetts Medical School
- Location
- Worcester, Massachusetts, United States
- Coordinates
- 42.247400, -71.806900
- Accuracy radius
- 20 km
- Postal code
- 01610
- Regional Internet Registry
- ARIN
- Allocated
- 1991-02-26
- Data source(s)
- maxmind_city, maxmind_country, maxmind_asn, ipinfo_lite
- Last updated
- 2026-07-11 09:23:26
BGP Routing
Live BGP anomalies →Origin AS announcing the most-specific prefix that covers this IP, observed across our RIPE RIS collectors.
Frequently Asked Questions
Who owns 146.189.64.147?
146.189.64.147 is allocated to University of Massachusetts Medical School (AS5724), registered in Worcester, United States.
Where is 146.189.64.147 located?
The geolocation for 146.189.64.147 maps to Worcester, United States 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 146.189.64.147 on?
146.189.64.147 belongs to the 146.189.64.0/20 network block announced by AS5724. This range contains 4,096 addresses.
Does 146.189.64.147 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.
