178.21.138.113
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 (16y) +6
- Not on any threat blocklist +5
- Has a reverse-DNS (PTR) record +5
- Trust score 81 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
DNS records
- Reverse DNS (PTR)
- static-user-178-21-138-113.serczer.pl
- Forward-confirmed (FCrDNS)
- ✗ Mismatch
- PTR TTL
- 43200 s
- Reverse DNS last checked
- 2026-07-29 01:10 UTC
- Forward DNS last checked
- 2026-07-29 01:10 UTC
Reverse & forward DNS collected by the WorldIP scanner fleet — FCrDNS confirms the PTR hostname resolves back to this IP.
Network Allocation for 178.21.138.113
- CIDR range
- 178.21.136.0/21
- IP range (int)
- 2,987,755,520 — 2,987,757,567
- Prefix length
- /21
- Organization
- SerczerNET Malgorzata Nienaltowska
- ASN
- AS197480
- ASN name
- SerczerNET Malgorzata Nienaltowska
- Location
- Czarna Białostocka, Podlasie, Poland
- Coordinates
- 53.302000, 23.284600
- Accuracy radius
- 20 km
- Postal code
- 16-020
- Regional Internet Registry
- RIPE
- Allocated
- 2010-03-17
- Data source(s)
- maxmind_city, maxmind_country, maxmind_asn, ipinfo_lite
- Last updated
- 2026-07-28 04:09:08
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 178.21.138.113?
178.21.138.113 is allocated to SerczerNET Malgorzata Nienaltowska (AS197480), registered in Czarna Białostocka, Poland.
Where is 178.21.138.113 located?
The geolocation for 178.21.138.113 maps to Czarna Białostocka, Poland 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 178.21.138.113 on?
178.21.138.113 belongs to the 178.21.136.0/21 network block announced by AS197480. This range contains 2,048 addresses.
Does 178.21.138.113 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.
