# 51.21.129.118 — IP Intelligence Summary

51.21.129.118 is an IPv4 address operated by AMAZON-02 - Amazon.com, Inc., US (AS16509), with approximate network location Stockholm, United States. As of November 14, 2026, IPDebrief rates it Low Risk (0/100); no anonymizing service was detected.

- Canonical page: https://ipdebrief.com/51.21.129.118
- Last updated: 2026-11-14

## Ownership

- Organization: MNT-ADSI
- Network name: EC2-ARN
- Allocated block: 51.21.0.0/16
- ASN: AS16509 (https://ipdebrief.com/asn/16509)
- Regional registry: ARIN
- Registered holder: MNT-ADSI
- Routing operator: AMAZON-02 - Amazon.com, Inc., US
- Network registration country: SE
- Registrant address country: —
- Cloud / hosting provider: Amazon Web Services

## Location

- City: Stockholm
- Region: Stockholm County
- Country: United States
- Time zone: —

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

## Network classification

- Infrastructure type: Unknown
- 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 (0/100)
- Blocklist listings: 0
- Suspicious activity indicators: no
- Spam source: no

## DNS posture

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

- caa: Not found at queried name (com)
- spf: Not checked
- dmarc: Not checked
- dnssec: Unknown / lookup inconclusive (118.129.21.51.in-addr.arpa)
- fcrDns: Not checked

- TLS probe 443 at 51.21.129.118: Certificate not captured; current certificate unknown (unreachable)
- TLS probe 8443 at 51.21.129.118: Certificate not captured; current certificate unknown (unreachable)
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Source: IPDebrief, "51.21.129.118 IP intelligence", https://ipdebrief.com/51.21.129.118, updated 2026-11-14. Assessments are probabilistic.