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 (17y) +6
- Not on any threat blocklist +5
- Has a reverse-DNS (PTR) record +5
- Trust score 81 / 100
Experimental · trust-vectors model v1.2.1 — a transparent heuristic, not a definitive verdict. How it works →
DNS records
- Reverse DNS (PTR)
- src.si
- Forward-confirmed (FCrDNS)
- ✗ Mismatch
- PTR TTL
- 86400 s
- Reverse DNS last checked
- 2026-10-10 12:41 UTC
- Forward DNS last checked
- 2026-10-10 12:41 UTC
Forward DNS records for src.si
| Type | Value | Priority | TTL |
|---|---|---|---|
| A | 193.9.21.155 | — | 300s |
| MX | src-si.mail.protection.outlook.com | 0 | — |
| NS | ns1.src.si | — | — |
| NS | ns2.src.si | — | — |
| NS | taurus-1.siol.net | — | — |
| TXT | 4a7k8f2t6bsrhkkfsj4gu2qn6b | — | — |
| TXT | 6rt2pvk8qobgtpnqhs2obro232 | — | — |
| TXT | JEwXi5jt7P1zmwoDi+E9X9N5cQxZhXUSw00FdIWmEqxFF62ttNdjjDI0Q2IOxxPIrOqfyBcjV7uHu0i+DN2uEA== | — | — |
| TXT | MS=ms18457005 | — | — |
| TXT | atlassian-domain-verification=aCCH6SLlxeNGaBWj28QxVy9XrT3ezLKRUVSA/Q/Q4TmSKLZfMpYLwhl0PJuSbz0v | — | — |
| TXT | cisco-ci-domain-verification=5dfb3446ad60d8ebaa6bd77bb123fe0fad4ab5f4eb2c460bcb1e4691e55a185a | — | — |
| TXT | ciscocidomainverification=7f0398da35dbdd8fa28a84ee7d1512c6ae3dccb90c7a9fe5ca26d79b1157e368 | — | — |
| TXT | duo_sso_verification=RJ5ZKsVMdlVdGBpJsAAAMwwjGiez9TPVIaUWWxlP7JDu6UcGF0yr8qsui54iTjDG | — | — |
| TXT | e99a4jrougma6li8kamrana6bt | — | — |
| TXT | google-site-verification=56eRDYUdnJ4sZXLi_H8SGqDjv9E19SBCv7xtXZNSe5s | — | — |
| TXT | google-site-verification=mdGac60aT9egH_ayYFmfRIKp83qnJB8ZZkHk7XJvtVE | — | — |
| TXT | google-site-verification=u91Y2UxdoJwNdMrq3_LccjlmG_YscNCvnZlYAuZVk18 | — | — |
| TXT | l2JSKlttYsKp+H7+jyPq/NEwg2oQ72LIMTqr4ZXnaIQTZ0M/jou6JNSgx3Ojzj9ZA7QPOSEuRjXhWoEXzPkPEg== | — | — |
| TXT | mandrill_verify.Sy6IDbv6FDA6u7tZWHe4tA | — | — |
| TXT | mj1uvcfpug118tkm1esfn68j3h | — | — |
| TXT | n74mnf990qf60b6ufeqomrtd4s | — | — |
| TXT | taes4m683hkhrikdido9tjl39h. | — | — |
| TXT | tsmttrmljt7nb0tjpk29fbnauf. | — | — |
| TXT | v=DMARC1; p=quarantine; rua=mailto:dmarc.forensic@src.si; ruf=mailto:dmarc.forensic@src.si; fo=1 | — | — |
| TXT | v=spf1 include:_spf.mlsend.com mx a:posta.sunnycloud.si a:exch.src.si ip4:193.23.137.144 ip4:193.23.137.145 ip4:193.23.137.132 ip4:193.23.137.40 include:spf.protection.outlook.com ip4:193.9.21.158 include:spf.mandrillapp.com -all | — | — |
Reverse & forward DNS collected by the WorldIP scanner fleet — FCrDNS confirms the PTR hostname resolves back to this IP.
Domains hosted
as of 2026-10-04 UTC1
Registrable domains (like example.com) with at least one name resolving to this IP — counted once a week from issued.live's DNS snapshot.
Domain data provided by issued.live — for full details visit https://issued.live/pricing
Reverse DNS history
How this IP's reverse DNS (PTR) has changed over time, from our scans.
- src.si stable — Jun 1, 2026 → present 1 brief no-PTR dropout
Network Allocation for 193.9.21.155
- CIDR range
- 193.9.21.0/24
- IP range (int)
- 3,238,597,888 — 3,238,598,143
- Prefix length
- /24
- Organization
- Optimus IT d.o.o.
- ASN
- AS48894
- ASN name
- Optimus IT d.o.o.
- Location
- Slovenia
- Coordinates
- 46.083300, 15.000000
- Accuracy radius
- 50 km
- Regional Internet Registry
- RIPE
- Allocated
- 2009-02-24
- Data source(s)
- maxmind_city, maxmind_country, maxmind_asn, ipinfo_lite
- Last updated
- 2026-10-03 08:40:24
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 193.9.21.155?
193.9.21.155 is allocated to Optimus IT d.o.o. (AS48894), registered in Slovenia.
Where is 193.9.21.155 located?
The geolocation for 193.9.21.155 maps to Slovenia 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 193.9.21.155 on?
193.9.21.155 belongs to the 193.9.21.0/24 network block announced by AS48894. This range contains 256 addresses.
Does 193.9.21.155 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.
