# 18.139.88.128 — IP Intelligence Summary

18.139.88.128 is an IPv4 address operated by Amazon Web Services (AS16509), with approximate network location Chicago, United States. Its reverse DNS name is ec2-18-139-88-128.ap-southeast-1.compute.amazonaws.com. As of September 30, 2026, IPDebrief rates it Low Risk (0/100); no anonymizing service was detected.

- Canonical page: https://ipdebrief.com/18.139.88.128
- Last updated: 2026-09-30

## Ownership

- Organization: Amazon Data Services Singapore
- Network name: AMAZON-SIN
- Allocated block: 18.138.0.0/15
- ASN: AS16509 (https://ipdebrief.com/asn/16509)
- Regional registry: ARIN
- Registered holder: Amazon Data Services Singapore
- Routing operator: —
- Network registration country: Singapore
- Registrant address country: —
- Cloud / hosting provider: Amazon Web Services

## Location

- City: Chicago
- Region: US-IL
- Country: United States
- Time zone: America/Chicago

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

## Reverse DNS

- ec2-18-139-88-128.ap-southeast-1.compute.amazonaws.com
- Forward-confirmed: yes

## Exposed services

- 443/tcp — https

## DNS posture

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

- spf: Not checked
- dmarc: Not checked
- fcrDns: Not checked
- dnssec: Not checked
- caa: Not checked

## TLS observations

- CN=lms-aws-ap-southeast-1.roblox.com; port unknown; target —; Historical certificate; current certificate unknown; valid until 2027-04-07T23:59:59.0000000+00:00

## Nearby addresses

- 18.139.88.102 (https://ipdebrief.com/18.139.88.102)

## Addresses sharing infrastructure

- 3.1.11.95 — Same TLS certificate (https://ipdebrief.com/3.1.11.95)
- 13.215.106.242 — Same TLS certificate (https://ipdebrief.com/13.215.106.242)
- 47.128.163.153 — Same TLS certificate (https://ipdebrief.com/47.128.163.153)
- 47.131.39.42 — Same TLS certificate (https://ipdebrief.com/47.131.39.42)
- 47.131.150.73 — Same TLS certificate (https://ipdebrief.com/47.131.150.73)
- 54.179.13.94 — Same TLS certificate (https://ipdebrief.com/54.179.13.94)
- 56.10.110.145 — Same TLS certificate (https://ipdebrief.com/56.10.110.145)

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Source: IPDebrief, "18.139.88.128 IP intelligence", https://ipdebrief.com/18.139.88.128, updated 2026-09-30. Assessments are probabilistic.