sync.stackoverflow.tech - robtex.com

sync.stackoverflow.tech

DNSSEC⚠️ Not signed
A104.21.20.248Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.195.37🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.20.248, 172.67.195.37
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=5, name=cloudflare-ech.com

stackoverflow.tech

DNSSEC⚠️ Not signed
NShank.ns.cloudflare.com ⭐
NSroxy.ns.cloudflare.com
SOAhank.ns.cloudflare.comdns@cloudflare.com serial=2407520773
📈 Tranco rank: #48,814

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DNS History

4 records (2 active, 2 former)

201820192020202120222023202420252026A104.21.20.248172.67.195.37104.25.149.99104.25.150.99
●A104.21.20.2482026-02-19 → 2026-07-08 · 3 obs
○ 2017-12-09 22:54:54
● 2026-02-19 10:12:06
● 2026-07-08 00:37:24
○A104.25.149.992017-12-09 → 2017-12-09 · 3 obs
● 2017-12-09 22:54:54
○ 2026-02-19 10:12:06
○ 2026-07-08 00:37:24
○A104.25.150.992017-12-09 → 2017-12-09 · 3 obs
● 2017-12-09 22:54:54
○ 2026-02-19 10:12:06
○ 2026-07-08 00:37:24
●A172.67.195.372026-02-19 → 2026-07-08 · 3 obs
○ 2017-12-09 22:54:54
● 2026-02-19 10:12:06
● 2026-07-08 00:37:24

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
techns01.trs-dns.com, ns01.trs-dns.net, ns10.trs-dns.org, ns10.trs-dns.info-
stackoverflow.techroxy.ns.cloudflare.com, hank.ns.cloudflare.com-

✅ Authoritative Response

Server:173.245.59.116

NS records: roxy.ns.cloudflare.com, hank.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for stackoverflow.tech (unsigned zone)

⏱️ Timing

Total: 78ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.195.37, 104.21.20.248
HTTPS1{"priority":1,"target":".","alpn":["h3",

Analysis

IP Addresses

sync.stackoverflow.tech resolves to the IP addresses 104.21.20.248 and 172.67.195.37

Additional host names — pcbovoorst.nl, www.coffeehttp.com, pugscode.org and two others — share IP numbers with sync.stackoverflow.tech.