# 188.1.37.90 — IP Intelligence Summary

188.1.37.90 is an IPv4 address operated by DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE (AS680), with approximate network location Germany. Its reverse DNS name is kr-gar188-4.x-win.dfn.de. As of November 14, 2026, IPDebrief rates it Low Risk (15/100); no anonymizing service was detected.

- Canonical page: https://ipdebrief.com/188.1.37.90
- Last updated: 2026-11-14

## Ownership

- Organization: Christian Grimm
- Network name: WIN-IP
- Allocated block: 188.1.0.0/16
- ASN: AS680 (https://ipdebrief.com/asn/680)
- Regional registry: RIPE
- Registered holder: Christian Grimm
- Routing operator: DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE
- Network registration country: DE
- Registrant address country: —

## Location

- City: —
- Region: —
- Country: Germany
- Time zone: Europe/Berlin

Approximate network location; registration and certificate addresses are not server-location evidence.

## Network classification

- Infrastructure type: —
- Datacenter / hosting: no
- Residential: no
- Mobile: no
- Anycast: Unverified (not proof of unicast)
- Tor exit node: no
- VPN: no
- Proxy: no

## Risk assessment

- Assessment: Low Risk (15/100)
- Blocklist listings: 0
- Suspicious activity indicators: no
- Spam source: no

## Reverse DNS

- kr-gar188-4.x-win.dfn.de
- Forward-confirmed: no

## DNS posture

Mail authentication and CAA are optional domain policies, not IP-wide requirements.

- caa: Not found at queried name (de)
- spf: Not checked
- dmarc: Not checked
- dnssec: Unknown / lookup inconclusive (90.37.1.188.in-addr.arpa)
- fcrDns: Not checked

## Addresses sharing infrastructure

- 188.1.144.74 — Same abuse contact (https://ipdebrief.com/188.1.144.74)
- 188.1.145.118 — Same abuse contact (https://ipdebrief.com/188.1.145.118)
- 188.1.145.133 — Same abuse contact (https://ipdebrief.com/188.1.145.133)
- 188.1.145.138 — Same abuse contact (https://ipdebrief.com/188.1.145.138)
- 188.1.145.198 — Same abuse contact (https://ipdebrief.com/188.1.145.198)
- 188.1.243.30 — Same abuse contact (https://ipdebrief.com/188.1.243.30)
- 188.1.243.34 — Same abuse contact (https://ipdebrief.com/188.1.243.34)
- 188.1.245.14 — Same abuse contact (https://ipdebrief.com/188.1.245.14)
- 194.95.4.240 — Same abuse contact (https://ipdebrief.com/194.95.4.240)

---

Source: IPDebrief, "188.1.37.90 IP intelligence", https://ipdebrief.com/188.1.37.90, updated 2026-11-14. Assessments are probabilistic.