37.113.128.21
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
- Not on any threat blocklist +5
- Has a reverse-DNS (PTR) record +5
- Isp allocation +5
- Established allocation (14y) +3
- Trust score 83 / 100
Experimental · trust-vectors model v1.2.1 — a transparent heuristic, not a definitive verdict. How it works →
DNS records
- Reverse DNS (PTR)
- pkp-niks.ru
- Forward-confirmed (FCrDNS)
- Not checked
- PTR TTL
- 21600 s
- Reverse DNS last checked
- 2026-10-08 14:17 UTC
- Forward DNS last checked
- 2026-10-08 14:17 UTC
Forward DNS records for pkp-niks.ru
| Type | Value | Priority | TTL |
|---|---|---|---|
| A | 104.21.29.52 | — | 300s |
| A | 172.67.171.94 | — | 300s |
| A | 31.177.76.32 | — | 172800s |
| A | 31.177.80.32 | — | 172800s |
| A | 87.249.215.40 | — | 172800s |
| MX | mail.pkp-niks.ru | 10 | — |
| MX | nomail.nic.ru | 0 | — |
| NS | dnsproxy1.fm.nic.ru | — | — |
| NS | dnsproxy2.fm.nic.ru | — | — |
| NS | ns3-l2.nic.ru | — | — |
| NS | ns4-cloud.nic.ru | — | — |
| NS | ns4-l2.nic.ru | — | — |
| NS | ns8-cloud.nic.ru | — | — |
| NS | ns8-l2.nic.ru | — | — |
| TXT | de7a2c3c1b49d124b949e2acdd64e9792f541ed6 | — | — |
| TXT | google-site-verification=3pFlE6FlbxYRCn85kket7fRKLSneCsSLyam0V5qIZXo | — | — |
| TXT | v=DMARC1; p=quarantine; rua=mailto:dmarc_info@pkp-niks.ru; pct=100; adkim=s; aspf=s | — | — |
| TXT | v=spf1 ip4:87.249.215.40 a:pkp-niks.ru mx:mail.pkp-niks.ru ~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 UTC0
issued.live saw no domain resolving to this IP in its latest weekly 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.
This IP's reverse DNS changes frequently — the timeline below shows the most recent changes.
- pkp-niks.ru — Oct 6, 2026 → present
- mail.pkp-niks.ru — Oct 6, 2026 → Oct 6, 2026
- pkp-niks.ru — Oct 5, 2026 → Oct 6, 2026
- mail.pkp-niks.ru — Oct 5, 2026 → Oct 5, 2026
- pkp-niks.ru — Oct 4, 2026 → Oct 5, 2026
- mail.pkp-niks.ru — Oct 3, 2026 → Oct 4, 2026
- pkp-niks.ru — Oct 2, 2026 → Oct 3, 2026
- mail.pkp-niks.ru — Oct 2, 2026 → Oct 2, 2026
- pkp-niks.ru — Oct 1, 2026 → Oct 2, 2026
- mail.pkp-niks.ru — Sep 30, 2026 → Oct 1, 2026
- pkp-niks.ru — Sep 27, 2026 → Sep 30, 2026
- mail.pkp-niks.ru — Sep 27, 2026 → Sep 27, 2026
- pkp-niks.ru — Sep 26, 2026 → Sep 27, 2026
- mail.pkp-niks.ru — Sep 26, 2026 → Sep 26, 2026
- pkp-niks.ru — Aug 25, 2026 → Sep 26, 2026
- mail.pkp-niks.ru — Aug 24, 2026 → Aug 25, 2026
- pkp-niks.ru — Jun 27, 2026 → Aug 24, 2026
- mail.pkp-niks.ru — Jun 24, 2026 → Jun 27, 2026
- pkp-niks.ru — Jun 21, 2026 → Jun 24, 2026
- mail.pkp-niks.ru — Jun 15, 2026 → Jun 21, 2026
- pkp-niks.ru — Jun 13, 2026 → Jun 15, 2026
- mail.pkp-niks.ru — Jun 4, 2026 → Jun 13, 2026
Network Allocation for 37.113.128.21
- CIDR range
- 37.113.128.0/22
- IP range (int)
- 628,195,328 — 628,196,351
- Prefix length
- /22
- Organization
- JSC ER-Telecom Holding
- ASN
- AS41661
- ASN name
- JSC ER-Telecom Holding
- Location
- Chelyabinsk, Chelyabinsk Oblast, Russia
- Coordinates
- 55.155300, 61.431300
- Accuracy radius
- 20 km
- Postal code
- 454000
- Regional Internet Registry
- RIPE
- Allocated
- 2012-02-09
- Data source(s)
- maxmind_city, maxmind_asn, ipinfo_lite, maxmind_country
- Last updated
- 2026-10-07 08:42:49
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 37.113.128.21?
37.113.128.21 is allocated to JSC ER-Telecom Holding (AS41661), registered in Chelyabinsk, Russia.
Where is 37.113.128.21 located?
The geolocation for 37.113.128.21 maps to Chelyabinsk, Russia 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 37.113.128.21 on?
37.113.128.21 belongs to the 37.113.128.0/22 network block announced by AS41661. This range contains 1,024 addresses.
Does 37.113.128.21 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.
