45.77.173.221
Intelligence Briefing: 45.77.173.221/32
The IP address 45.77.173.221 was classified as Low Risk with a risk score of 25. Ownership data linked the address to Vultr Holdings, LLC (AS20473) within the 45.77.172.0/23 CIDR block in Singapore.
Network role analysis identified the host as a Web Server with open TCP ports 80 and 443. TLS certificate inspection revealed issuance by Let's Encrypt for the subject CN=admin.samuraikurobushi.co.id, with Subject Alternative Names including admin.skies.rmdn.dev and cloud.samuraikurobushi.co.id. DNS PTR records resolved to 45.77.173.221.vultrusercontent.com, and forward resolution confirmed the domain vultrusercontent.com.
Threat intelligence indicators showed zero blacklist hits and no associations with known campaigns, Tor exit nodes, or spam sources. Email authentication protocols (SPF and DMARC) were present on associated domains.
Assessment: The address presented no immediate threat indicators. Standard monitoring protocols were advised.
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
🏢 Ownership & Registration
| Organization | Vultr Holdings, LLC |
| ASN | AS20473 |
| Network Name | NET-45-77-172-0-23 |
| CIDR Block | 45.77.172.0/23 |
| RIR | ARIN |
| Country | Singapore |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR | 45.77.173.221.vultrusercontent.com |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | 45.77.173.221.vultrusercontent.com |
🔐 DNS Hygiene
| Hygiene Score | 60% (Good) |
| SPF | 3/4 domains |
| DMARC | 1/4 domains |
| FCrDNS | Not verified |
| DNSSEC | Valid |
| CAA | Not configured |
| Domains Checked | 4 domains |
☁️ Network Classification
| Infrastructure | Infrastructure / Datacenter |
| Service Purpose | Web Server |
| Network Tier | Hosting — Infrastructure provider without advanced routing |
🔌 Services & Open Ports
| Port | Service | Protocol | Banner |
|---|---|---|---|
| 80 | http | tcp | — |
| 443 | https | tcp | — |
| Closed Ports | 22, 25, 3389, 8080, 8443 (2 open / 7 scanned) | ||
| Server | Web server detected |
| HTTP Title | — |
🔐 TLS Certificate
CN=admin.samuraikurobushi.co.id was found on this IP. This may indicate a previously hosted website, a decommissioned service, or stale infrastructure.| SANs | admin.samuraikurobushi.co.idadmin.skies.rmdn.devcloud.samuraikurobushi.co.idcloud.skies.rmdn.devdev.admin.samuraikurobushi.co.iddev.admin.skies.rmdn.devdev.cloud.samuraikurobushi.co.iddev.cloud.skies.rmdn.devsupport.samuraikurobushi.co.id |
| Valid From | 2026-06-03T02:16:46+00:00 |
| Valid Until | 2026-09-01T02:16:45+00:00 (expired) |
| TLS Protocol | Tls13 |
| Cipher Suite | TLS_AES_256_GCM_SHA384 |
| Signature Algorithm | sha384ECDSA |
| Validity Period | 89 days |
🛡️ Public Network Snapshot
| Origin ASN | AS20473 |
| Network Prefix | 45.77.168.0/21 |
| Route mapping | Found |
| HSTS | Not detected |
| CSP | Not detected |
| HTTP/2 | Not detected |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 23% | 2 | 2 |
| routing | 8% | 1 | 1 |
| services | 31% | 2 | 3 |
| ownership | 17% | 2 | 3 |
| reputation | 11% | 1 | 2 |
| geolocation | 27% | 2 | 3 |
| Overall | 20% | 10 | 14 |
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | Low (35%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-07-05 11:43:21 UTC |
| Last Seen | 2026-08-26 23:58:32 UTC |
| Profile Built | 2026-08-29 06:56:21 UTC |
| Data Freshness | Live |
| Signal Types | 24 |
| Total Observations | 29 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 45.77.173.221
Who owns the IP address 45.77.173.221?
45.77.173.221 is registered to Vultr Holdings, LLC. The address falls within the 45.77.172.0/23 network block. Registration is held at ARIN.
Where is 45.77.173.221 located?
Geolocation data places 45.77.173.221 in Singapore. IP geolocation is approximate and indicates the network's registered or routed location rather than a precise physical address.
Is 45.77.173.221 malicious or safe?
45.77.173.221 currently carries a low risk assessment, meaning no significant threat indicators have been observed. This assessment is generated from continuously collected signals and can change over time.
What is the hostname for 45.77.173.221?
The reverse DNS (PTR) record for 45.77.173.221 is 45.77.173.221.vultrusercontent.com. This hostname is not forward-confirmed, so it should be treated as a weak signal.
What ports are open on 45.77.173.221?
Responsive ports observed on 45.77.173.221 include 80, 443. Port visibility reflects the most recent scan and may change as the host's configuration or firewall rules change.
Is 45.77.173.221 a VPN, proxy, or data center address?
45.77.173.221 is classified as cloud infrastructure and hosting infrastructure based on network ownership and behavioural analysis.