# 100.51.163.213 — IP Intelligence Summary

100.51.163.213 is an IPv4 address operated by AMAZON-AES - Amazon.com, Inc., US (AS14618), with approximate network location Ashburn, United States. As of November 13, 2026, IPDebrief rates it Low Risk (0/100); no anonymizing service was detected.

- Canonical page: https://ipdebrief.com/100.51.163.213
- Last updated: 2026-11-13

## Ownership

- Organization: Amazon Data Services Northern Virginia
- Network name: AMAZON-IAD
- Allocated block: 100.48.0.0/12
- ASN: AS14618 (https://ipdebrief.com/asn/14618)
- Regional registry: ARIN
- Registered holder: Amazon Data Services Northern Virginia
- Routing operator: AMAZON-AES - Amazon.com, Inc., US
- Network registration country: United States
- Registrant address country: —
- Cloud / hosting provider: Amazon Web Services

## Location

- City: Ashburn
- Region: VA
- Country: United States
- Time zone: America/New_York

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 (213.163.51.100.in-addr.arpa)
- fcrDns: Not checked

## TLS observations

- CN=*.prod.notifications.api.blackboard.com; port unknown; target —; Historical certificate; current certificate unknown; valid until 2027-03-10T23:59:59.0000000+00:00

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

AI-generated assessment. Verify critical details independently.

On 2026-01-25, IP address 100.51.163.213/32 was observed as an active host validated by the server. The address is assigned to Amazon Data Services Northern Virginia (AS14618) within the 100.48.0.0/12 block and resolves to a location in Ashburn, Virginia, United States. The network profile identifies the infrastructure as a Web Server operated by Amazon Web Services, though specific service categorization flags for CDN, VPN, proxy, Tor, hosting, mobile, or residential use remain unverified.

Network hygiene assessments for DNSSEC, SPF, DMARC, and CAA returned unknown or not-checked statuses, indicating no definitive evidence of poor configuration was collected during this assessment. A historical TLS probe retrieved a certificate issued by "CN=Amazon RSA 2048 M01, O=Amazon, C=US" for the subject "CN=*.prod.notifications.api.blackboard.com," covering the validity window from 2026-08-25 to 2027-03-10.

The assigned risk score for the host is zero. Due to the historical nature of the TLS evidence and the lack of live endpoint validation, the connection between this IP and the Blackboard notification service is inferred but not confirmed by active TLS inspection. Continuous monitoring or corroboration with traffic flow data is recommended to verify the current operational state and purpose of the address.

## Addresses sharing infrastructure

- 3.234.103.243 — Same TLS certificate (https://ipdebrief.com/3.234.103.243)
- 13.223.213.67 — Same TLS certificate (https://ipdebrief.com/13.223.213.67)
- 34.195.174.255 — Same TLS certificate (https://ipdebrief.com/34.195.174.255)
- 34.202.50.43 — Same TLS certificate (https://ipdebrief.com/34.202.50.43)
- 34.225.40.87 — Same TLS certificate (https://ipdebrief.com/34.225.40.87)
- 50.16.33.57 — Same TLS certificate (https://ipdebrief.com/50.16.33.57)
- 50.17.85.55 — Same TLS certificate (https://ipdebrief.com/50.17.85.55)
- 52.2.53.12 — Same TLS certificate (https://ipdebrief.com/52.2.53.12)
- 52.3.247.228 — Same TLS certificate (https://ipdebrief.com/52.3.247.228)
- 52.6.54.158 — Same TLS certificate (https://ipdebrief.com/52.6.54.158)
- 52.45.243.173 — Same TLS certificate (https://ipdebrief.com/52.45.243.173)
- 52.71.247.11 — Same TLS certificate (https://ipdebrief.com/52.71.247.11)

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Source: IPDebrief, "100.51.163.213 IP intelligence", https://ipdebrief.com/100.51.163.213, updated 2026-11-13. Assessments are probabilistic.