91.139.128.6
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
- Multiple-origin (MOAS) routing anomaly −12
- Forward-confirmed reverse DNS (FCrDNS) +10
- Long-established allocation (20y) +6
- Not on any threat blocklist +5
- Trust score 74 / 100
Experimental · trust-vectors model v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →
DNS records
- Reverse DNS (PTR)
- 91-139-128-6.sf.ddns.bulsat.com
- Forward-confirmed (FCrDNS)
- ✓ Confirmed
- PTR TTL
- 51279947 s
- Reverse DNS last checked
- 2026-07-18 16:39 UTC
- Forward DNS last checked
- 2026-07-18 16:39 UTC
Forward DNS records for 91-139-128-6.sf.ddns.bulsat.com
| Type | Value | Priority | TTL |
|---|---|---|---|
| A | 91.139.128.6 | — | 345600s |
| TXT | 00365747e8bd56695c24a71490a12dba88 | — | — |
Reverse & forward DNS collected by the WorldIP scanner fleet — FCrDNS confirms the PTR hostname resolves back to this IP.
Network Allocation for 91.139.128.6
- CIDR range
- 91.139.128.0/21
- IP range (int)
- 1,535,868,928 — 1,535,870,975
- Prefix length
- /21
- Organization
- Vivacom Bulgaria EAD
- ASN
- AS43205
- ASN name
- Vivacom Bulgaria EAD
- Location
- Sofia, Sofia Capital, Bulgaria
- Coordinates
- 42.682600, 23.322300
- Accuracy radius
- 10 km
- Postal code
- 1000
- Regional Internet Registry
- RIPE
- Allocated
- 2006-10-18
- Data source(s)
- maxmind_city, maxmind_asn, ipinfo_lite, maxmind_country
- Last updated
- 2026-07-09 06:20:55
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 91.139.128.6?
91.139.128.6 is allocated to Vivacom Bulgaria EAD (AS43205), registered in Sofia, Bulgaria.
Where is 91.139.128.6 located?
The geolocation for 91.139.128.6 maps to Sofia, Bulgaria 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 91.139.128.6 on?
91.139.128.6 belongs to the 91.139.128.0/21 network block announced by AS43205. This range contains 2,048 addresses.
Does 91.139.128.6 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.
