`ss.microsoft-365-aa4.workers.dev`

DNSSEC	⚠️ Not signed
A	2606:4700:3030::ac43:8ca6^{🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3035::6815:412f^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.65.47^{Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.140.166^{🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.65.47, 172.67.140.166
		IPv6 hints	2606:4700:3030::ac43:8ca6, 2606:4700:3035::6815:412f
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=110, name=cloudflare-ech.com

`microsoft-365-aa4.workers.dev`

	DNSSEC	⚠️ Not signed
	NS	`cecelia.ns.cloudflare.com` ⭐
	NS	`mitchell.ns.cloudflare.com`
	SOA	`cecelia.ns.cloudflare.com`dns@cloudflare.com serial=2403529316

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DNS History

4 records (4 active, 0 former)

●A104.21.65.472026-04-16 → 2026-05-09 · 2 obs

● 2026-04-16 18:35:42
● 2026-05-09 19:08:44

●A172.67.140.1662026-04-16 → 2026-05-09 · 2 obs

● 2026-04-16 18:35:42
● 2026-05-09 19:08:44

●A2606:4700:3030::ac43:8ca62026-04-16 → 2026-05-09 · 2 obs

● 2026-04-16 18:35:42
● 2026-05-09 19:08:44

●A2606:4700:3035::6815:412f2026-04-16 → 2026-05-09 · 2 obs

● 2026-04-16 18:35:42
● 2026-05-09 19:08:44

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
workers.dev	sofia.ns.cloudflare.com, clyde.ns.cloudflare.com	-
microsoft-365-aa4.workers.dev	cecelia.ns.cloudflare.com, mitchell.ns.cloudflare.com	-

✅ Authoritative Response

Server:162.159.38.135

NS records: cecelia.ns.cloudflare.com, mitchell.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for workers.dev (unsigned zone)

⏱️ Timing

Total: 205ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.140.166, 104.21.65.47`
AAAA	2	`2606:4700:3030::ac43:8ca6, 2606:4700:3035::6815:412f`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`

Analysis

IP Addresses

ss.microsoft-365-aa4.workers.dev resolves to four IP numbers: 2606:4700:3030::ac43:8ca6, 2606:4700:3035::6815:412f, 104.21.65.47 and 172.67.140.166.

Other host names such as www.lpimg.com, autoankauf-in-hamburg.de, www.cafcachoeiro.com.br, infoserres.gr and num.finance share IPs with ss.microsoft-365-aa4.workers.dev.

ss.microsoft-365-aa4.workers.dev - robtex.com