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 (16y) +6
- Not on any threat blocklist +5
- Enterprise allocation +4
- Trust score 90 / 100
Experimental · trust-vectors model v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →
DNS records
- Reverse DNS (PTR)
- sv2129.xserver.jp
- Forward-confirmed (FCrDNS)
- ✓ Confirmed
- PTR TTL
- 3600 s
- Reverse DNS last checked
- 2026-07-19 05:37 UTC
- Forward DNS last checked
- 2026-07-19 05:37 UTC
Forward DNS records for sv2129.xserver.jp
| Type | Value | Priority | TTL |
|---|---|---|---|
| A | 183.90.242.30 | — | 172800s |
| TXT | v=spf1 +a:sv2129.xserver.jp include:spf.sender.xserver.jp ~all | — | — |
Reverse & forward DNS collected by the WorldIP scanner fleet — FCrDNS confirms the PTR hostname resolves back to this IP.
Network Allocation for 183.90.242.30
- CIDR range
- 183.90.224.0/19
- IP range (int)
- 3,076,186,112 — 3,076,194,303
- Prefix length
- /19
- Organization
- Xserver Inc.
- ASN
- AS131965
- ASN name
- Xserver Inc.
- Location
- Japan
- Coordinates
- 35.690000, 139.690000
- Accuracy radius
- 500 km
- Regional Internet Registry
- APNIC
- Allocated
- 2010-05-20
- Data source(s)
- maxmind_asn, ipinfo_lite, maxmind_city, maxmind_country
- Last updated
- 2026-07-08 06:22:30
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 183.90.242.30?
183.90.242.30 is allocated to Xserver Inc. (AS131965), registered in Japan.
Where is 183.90.242.30 located?
The geolocation for 183.90.242.30 maps to Japan 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 183.90.242.30 on?
183.90.242.30 belongs to the 183.90.224.0/19 network block announced by AS131965. This range contains 8,192 addresses.
Does 183.90.242.30 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.
