Check-Host.cc

Domain

api.dev.auth.optum.com

Aggregated from public BGP, CT logs, our scan layer, honeypots and global probes.

Run a live full scan of api.dev.auth.optum.com

On-demand: ports, banners, TLS, tech-stack, subdomains and origin/IP-leak detection. Results are shared publicly for everyone to link to.

Deep-scan now
Hosting IPs
8
A/AAAA targets
Subdomains
CT + scan + body
Record Types
1
seen in DNS
Observed Certs
34
in our scans

DNS Records

A
100.49.22.194, 100.56.53.239, 13.219.27.182, 34.199.158.120, 34.225.53.141, 52.54.83.93, 54.197.15.101, 98.95.135.217
AAAA
MX
NS
TXT
CNAME
CAA

WHOIS / Registration

Registration data planned

Registrar, creation/expiry dates and domain status via RDAP. Rolling out gradually — bulk WHOIS is rate-limited, so we resolve on a prioritized cadence.

Subdomains

Subdomain enumeration pending

Every subdomain ever issued a TLS cert under this apex — extracted from Certificate Transparency logs, our own scan observations and body references.

Tech Stack

Tech detection pending

Wappalyzer-rules detect CMS, frameworks, analytics, JS libs and server-side languages on this domain.

TLS Certificates

Subject: api.dev.auth.optum.com
Issuer: Sectigo Public Server Authentication CA OV R36
SANs: api.dev.auth.optum.com

IPs Citing This Domain

No citing IPs found yet

As the world-sweep progresses, hosts referencing this domain in their HTML will surface here.

Origin / IP-Leak

USP

When a hostname is served behind a CDN (e.g. Cloudflare), the origin server can sometimes be identified by matching its TLS cert against the protected hostname. Findings shown here are heuristic candidates, not guarantees.

No origin-IP leaks detected (yet)

Either this domain doesn't sit behind a CDN, or we haven't seen a TLS cert from a non-CDN IP matching this hostname. Run a fullscan to refresh the cert→IP cross-reference.

CT-Log Evidence

Certificates from public Certificate Transparency logs whose subject or SAN names this domain — including historic certs we never observed live.

4d1b9ca4a29f553d… google · xenon2026h2
Subject: api.dev.auth.optum.com
Issuer: Sectigo Public Server Authentication CA OV R36
SANs: api.dev.auth.optum.com
Valid: 2026-03-30 00:00:00 → 2026-10-14 23:59:59
5893b43f7be93c7d… google · xenon2026h2
Subject: api.dev.auth.optum.com
Issuer: Sectigo Public Server Authentication CA OV R36
SANs: api.dev.auth.optum.com
Valid: 2026-03-16 00:00:00 → 2026-09-30 23:59:59
e59f7dd62b0713da… google · xenon2026h2
Subject: api.dev.auth.optum.com
Issuer: Sectigo Public Server Authentication CA OV R36
SANs: api.dev.auth.optum.com
Valid: 2026-03-16 00:00:00 → 2026-09-30 23:59:59
b35da8d8cfac3e28… google · xenon2026h2
Subject: api.dev.auth.optum.com
Issuer: Sectigo Public Server Authentication CA OV R36
SANs: api.dev.auth.optum.com
Valid: 2026-03-13 00:00:00 → 2026-09-27 23:59:59
bc48c41c11966659… google · xenon2026h2
Subject: api.dev.auth.optum.com
Issuer: Sectigo Public Server Authentication CA OV R36
SANs: api.dev.auth.optum.com
Valid: 2026-03-13 00:00:00 → 2026-09-27 23:59:59
8b346458b22ceda9… google · argon2026h2
Subject: api.dev.auth.optum.com
Issuer: Amazon RSA 2048 M02
SANs: api.dev.auth.optum.com
Valid: 2025-08-18 00:00:00 → 2026-09-16 23:59:59
0fe8a5015db340fb… google · argon2026h2
Subject: api.dev.auth.optum.com
Issuer: Sectigo Public Server Authentication CA OV R36
SANs: api.dev.auth.optum.com
Valid: 2025-08-18 00:00:00 → 2026-08-18 23:59:59
151ef5df8fe69e4e… google · xenon2026h2
Subject: api.dev.auth.optum.com
Issuer: Sectigo Public Server Authentication CA OV R36
SANs: api.dev.auth.optum.com
Valid: 2025-08-18 00:00:00 → 2026-08-18 23:59:59
4ee5ab3f43e54c90… google · argon2026h2
Subject: api.dev.auth.optum.com
Issuer: Amazon RSA 2048 M04
SANs: api.dev.auth.optum.com
Valid: 2025-08-18 00:00:00 → 2026-09-16 23:59:59
60fa4e415404f147… google · xenon2026h2
Subject: api.dev.auth.optum.com
Issuer: Sectigo Public Server Authentication CA OV R36
SANs: api.dev.auth.optum.com
Valid: 2025-08-18 00:00:00 → 2026-08-18 23:59:59
6857e686a7dfa824… google · argon2026h2
Subject: api.dev.auth.optum.com
Issuer: Amazon RSA 2048 M02
SANs: api.dev.auth.optum.com
Valid: 2025-08-18 00:00:00 → 2026-09-16 23:59:59
6e6df147a1329af0… google · xenon2026h2
Subject: api.dev.auth.optum.com
Issuer: Sectigo Public Server Authentication CA OV R36
SANs: api.dev.auth.optum.com
Valid: 2025-08-18 00:00:00 → 2026-08-18 23:59:59
7354e1e55c64437f… google · argon2026h2
Subject: api.dev.auth.optum.com
Issuer: Sectigo Public Server Authentication CA OV R36
SANs: api.dev.auth.optum.com
Valid: 2025-08-18 00:00:00 → 2026-08-18 23:59:59
8b346458b22ceda9… google · xenon2026h2
Subject: api.dev.auth.optum.com
Issuer: Amazon RSA 2048 M02
SANs: api.dev.auth.optum.com
Valid: 2025-08-18 00:00:00 → 2026-09-16 23:59:59
96d52507b0859e4d… google · argon2026h2
Subject: api.dev.auth.optum.com
Issuer: Sectigo Public Server Authentication CA OV R36
SANs: api.dev.auth.optum.com
Valid: 2025-08-18 00:00:00 → 2026-08-18 23:59:59
b1e30c9a7be9a291… google · argon2026h2
Subject: api.dev.auth.optum.com
Issuer: Amazon RSA 2048 M04
SANs: api.dev.auth.optum.com
Valid: 2025-08-18 00:00:00 → 2026-09-16 23:59:59

Threat Intelligence

Domain threat-intel pending

Matches in URLhaus, OpenPhish, PhishTank, malware feeds, and Spamhaus DBL.

History

Passive DNS — every value this name ever resolved to and when we first / last observed it. Updates every cycle of our forward-DNS crawler.

Type Value First seen Last seen
A 34.199.158.120 2026-05-31 01:09:40.756 2026-05-31 01:09:40.756
A 34.225.53.141 2026-05-31 01:09:40.756 2026-05-31 01:09:40.756
A 13.219.27.182 2026-05-31 01:09:40.756 2026-05-31 01:09:40.756
A 54.197.15.101 2026-05-31 01:09:40.756 2026-05-31 01:09:40.756
A 52.54.83.93 2026-07-16 02:36:50.389 2026-07-16 02:36:50.389
A 98.95.135.217 2026-07-16 02:36:50.389 2026-07-16 02:36:50.389
A 100.49.22.194 2026-07-16 02:36:50.389 2026-07-16 02:36:50.389
A 100.56.53.239 2026-07-16 02:36:50.389 2026-07-16 02:36:50.389