www.nycteachingcollaborative.org - robtex.com

www.nycteachingcollaborative.org

DNSSEC⚠️ Not signed
A2606:4700:3037::6815:1d3c🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::ac43:9481🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.29.60Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.148.129🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.29.60, 172.67.148.129
IPv6 hints2606:4700:3037::6815:1d3c, 2606:4700:3037::ac43:9481
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=29, name=cloudflare-ech.com

nycteachingcollaborative.org

DNSSEC⚠️ Not signed
A2606:4700:3037::6815:1d3c🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::ac43:9481🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.29.60Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.148.129🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSkarl.ns.cloudflare.com ⭐
NSmira.ns.cloudflare.com
MXsmtp.secureserver.net ⭐
MXmailstore1.secureserver.net(10)
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.29.60, 172.67.148.129
IPv6 hints2606:4700:3037::6815:1d3c, 2606:4700:3037::ac43:9481
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=29, name=cloudflare-ech.com
SOAkarl.ns.cloudflare.comdns@cloudflare.com serial=2409972581
rank #791223 globally
rank #60821 in the tld

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DNS History

6 records (4 active, 2 former)

20192020202120222023202420252026A104.21.29.60172.67.148.1292606:4700:3037::6815:1d3c2606:4700:3037::ac43:9481104.207.225.3652.170.161.68
○A104.207.225.362018-06-28 → 2018-06-28 · 3 obs
● 2018-06-28 22:59:46
○ 2026-05-30 11:22:16
○ 2026-07-21 03:20:02
●A104.21.29.602026-05-30 → 2026-07-21 · 3 obs
○ 2018-06-28 22:59:46
● 2026-05-30 11:22:16
● 2026-07-21 03:20:02
●A172.67.148.1292026-05-30 → 2026-07-21 · 3 obs
○ 2018-06-28 22:59:46
● 2026-05-30 11:22:16
● 2026-07-21 03:20:02
●A2606:4700:3037::6815:1d3c2026-05-30 → 2026-07-21 · 3 obs
○ 2018-06-28 22:59:46
● 2026-05-30 11:22:16
● 2026-07-21 03:20:02
●A2606:4700:3037::ac43:94812026-05-30 → 2026-07-21 · 3 obs
○ 2018-06-28 22:59:46
● 2026-05-30 11:22:16
● 2026-07-21 03:20:02
○A52.170.161.682026-05-30 → 2026-07-21 · 2 obs
○ 2026-05-30 11:22:16
○ 2026-07-21 03:20:02

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
orgb2.org.afilias-nst.org, d0.org.afilias-nst.org, b0.org.afilias-nst.org-
nycteachingcollaborative.orgkarl.ns.cloudflare.com, mira.ns.cloudflare.com-

✅ Authoritative Response

Server:172.64.32.204

NS records: karl.ns.cloudflare.com, mira.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for nycteachingcollaborative.org (unsigned zone)

⏱️ Timing

Total: 2377ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.148.129, 104.21.29.60
AAAA22606:4700:3037::ac43:9481, 2606:4700:3037::6815:1d3c
HTTPS1{"priority":1,"target":".","alpn":["h3",

Analysis

IP Addresses

www.nycteachingcollaborative.org has four IP addresses: 104.21.29.60, 172.67.148.129, 2606:4700:3037::6815:1d3c and 2606:4700:3037::ac43:9481.

Additional host names — www.qiejiema.com, ezhouhome.com, pepperlab.beer and two others — share IP numbers with www.nycteachingcollaborative.org.