129.21.128.117
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 (39y) +6
- Not on any threat blocklist +5
- Trust score 86 / 100
Experimental · trust-vectors model v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →
DNS records
- Reverse DNS (PTR)
- knifeblock.ce.rit.edu
- Forward-confirmed (FCrDNS)
- ✓ Confirmed
- PTR TTL
- 43200 s
- Reverse DNS last checked
- 2026-07-18 11:32 UTC
- Forward DNS last checked
- 2026-07-18 11:32 UTC
Forward DNS records for knifeblock.ce.rit.edu
| Type | Value | Priority | TTL |
|---|---|---|---|
| A | 129.21.128.117 | — | 172800s |
| TXT | 001ceff9af702a32a6e2fe37955be93499 | — | — |
Reverse & forward DNS collected by the WorldIP scanner fleet — FCrDNS confirms the PTR hostname resolves back to this IP.
Network Allocation for 129.21.128.117
- CIDR range
- 129.21.128.0/20
- IP range (int)
- 2,165,669,888 — 2,165,673,983
- Prefix length
- /20
- Organization
- Rochester Institute of Technology
- ASN
- AS4385
- ASN name
- Rochester Institute of Technology
- Location
- Rochester, New York, United States
- Coordinates
- 43.080100, -77.634200
- Accuracy radius
- 200 km
- Postal code
- 14623
- Regional Internet Registry
- ARIN
- Allocated
- 1987-07-14
- Data source(s)
- maxmind_city, maxmind_country, maxmind_asn, ipinfo_lite
- Last updated
- 2026-07-11 09:23:13
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 129.21.128.117?
129.21.128.117 is allocated to Rochester Institute of Technology (AS4385), registered in Rochester, United States.
Where is 129.21.128.117 located?
The geolocation for 129.21.128.117 maps to Rochester, 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 129.21.128.117 on?
129.21.128.117 belongs to the 129.21.128.0/20 network block announced by AS4385. This range contains 4,096 addresses.
Does 129.21.128.117 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.
