# 16.18.127.51 — IP Intelligence Summary

16.18.127.51 is an IPv4 address operated by AMAZON-02 - Amazon.com, Inc., US (AS16509), with approximate network location Zurich, Switzerland. As of November 13, 2026, IPDebrief rates it Low Risk (0/100); no anonymizing service was detected.

- Canonical page: https://ipdebrief.com/16.18.127.51
- Last updated: 2026-11-13

## Ownership

- Organization: Amazon.com, Inc.
- Network name: AMAZO-4
- Allocated block: 16.15.0.0/16
- ASN: AS16509 (https://ipdebrief.com/asn/16509)
- Regional registry: ARIN
- Registered holder: Amazon.com, Inc.
- Routing operator: AMAZON-02 - Amazon.com, Inc., US
- Network registration country: United States
- Registrant address country: —
- Cloud / hosting provider: Amazon Web Services

## Location

- City: Zurich
- Region: Zurich
- Country: Switzerland
- Time zone: Europe/Zurich

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

## Exposed services

- 443/tcp — https

## DNS posture

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

- caa: Unknown / lookup inconclusive (amazonaws.com)
- spf: Not checked
- dmarc: Not checked
- dnssec: Unknown / lookup inconclusive (51.127.18.16.in-addr.arpa)
- fcrDns: Not checked

## TLS observations

- CN=lms-aws-eu-central-2.roblox.com; port unknown; target —; Historical certificate; current certificate unknown; valid until 2027-04-06T23:59:59.0000000+00:00

## Witness AI - IP Assessment (AI-generated)

AI-generated assessment. Verify critical details independently.

Intellective analysts observed network activity associated with the host address 16.18.127.51/32, which resolved to an active server. Routing registries identified the address block as belonging to AMAZON-02, operated by Amazon.com, Inc. under the network name AMAZO-4, registered in the United States within the 16.15.0.0/16 CIDR range. Geolocation data placed the approximate network location in Zurich, Switzerland. The network role classification indicated the infrastructure served as a Web Server hosted within an Amazon Web Services environment, though specific flags for CDN, proxy, or hosting services remained unverified.

A historical TLS certificate probe was recorded against the target. The certificate, issued by CN=Amazon RSA 2048 M04 for O=Amazon, C=US, was associated with the subject CN=lms-aws-eu-central-2.roblox.com, covering the domain sans: lms-aws-eu-central-2.roblox.com. The validity window for this certificate spanned from September 21, 2026, to April 6, 2027. Security hygiene checks for SPF, DMARC, CAA, and DNSSEC returned statuses of unknown or not checked, with no evaluated checks recorded for the assessed score. No active TLS endpoints were detected during the observation period. The assigned risk score was zero, and the anycast status was marked as unverified. Analysts recommend continued monitoring to corroborate the legitimacy of the traffic flow given the historical nature of the certificate data and the absence of current TLS endpoint observations.

## Addresses sharing infrastructure

- 16.18.49.96 — Same TLS certificate (https://ipdebrief.com/16.18.49.96)
- 16.18.204.164 — Same TLS certificate (https://ipdebrief.com/16.18.204.164)
- 16.19.0.52 — Same TLS certificate (https://ipdebrief.com/16.19.0.52)
- 16.62.132.61 — Same TLS certificate (https://ipdebrief.com/16.62.132.61)
- 16.62.176.117 — Same TLS certificate (https://ipdebrief.com/16.62.176.117)
- 51.96.13.204 — Same TLS certificate (https://ipdebrief.com/51.96.13.204)
- 51.96.60.52 — Same TLS certificate (https://ipdebrief.com/51.96.60.52)

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Source: IPDebrief, "16.18.127.51 IP intelligence", https://ipdebrief.com/16.18.127.51, updated 2026-11-13. Assessments are probabilistic.