isb.edu.com - robtex.com

isb.edu.com

DNSSEC⚠️ Not signed
A2606:4700:3035::ac43:92a4🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3036::6815:3993🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.57.147Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.146.164🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.57.147, 172.67.146.164
IPv6 hints2606:4700:3035::ac43:92a4, 2606:4700:3036::6815:3993
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=104, name=cloudflare-ech.com

edu.com

DNSSEC⚠️ Not signed
A13.248.188.218🇺🇸 Amazon13.248.176.0/20
NSjosephine.ns.cloudflare.com ⭐
NSsonny.ns.cloudflare.com
MXinbound-smtp.us-west-2.amazonaws.com ⭐
TXTgoogle-site-verification=XUwxzRiNw6-GXCUt8i5uonkV-HXKrdWqqUCY59zKzJQ
TXTv=spf1 include:amazonses.com ~all
SOAjosephine.ns.cloudflare.comdns@cloudflare.com serial=2409298745
WOT: SAFE (45/100)
rank #113352 globally
rank #49480 in the tld
WOT: SUSPICIOUS (41/100)
📈 Tranco rank: #195,877

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DNS History

13 records (4 active, 9 former)

20162017201820192020202120222023202420252026A104.21.57.147172.67.146.1642606:4700:3035::ac43:92a42606:4700:3036::6815:39932606:4700:3035::6815:399352.11.191.13452.32.33.14152.36.123.15252.88.182.10654.200.70.5754.201.192.18454.68.152.21754.69.21.211
●A104.21.57.1472026-06-27 → 2026-08-03 · 3 obs
○ 2016-05-04 21:21:12
● 2026-06-27 01:18:24
● 2026-08-03 01:24:16
●A172.67.146.1642026-06-27 → 2026-08-03 · 3 obs
○ 2016-05-04 21:21:12
● 2026-06-27 01:18:24
● 2026-08-03 01:24:16
○A2606:4700:3035::6815:39932026-06-27 → 2026-06-27 · 4 obs
○ 2016-05-04 21:21:12
● 2026-06-27 01:18:24
○ 2026-07-10 09:50:00
○ 2026-08-03 01:24:16
●A2606:4700:3035::ac43:92a42026-06-27 → 2026-08-03 · 3 obs
○ 2016-05-04 21:21:12
● 2026-06-27 01:18:24
● 2026-08-03 01:24:16
●A2606:4700:3036::6815:39932026-07-10 → 2026-08-03 · 3 obs
○ 2026-06-27 01:18:24
● 2026-07-10 09:50:00
● 2026-08-03 01:24:16
○A52.11.191.1342015-07-26 → 2015-07-26 · 3 obs
● 2015-07-26 02:42:24
○ 2015-11-19 13:59:16
○ 2026-08-03 01:24:16
○A52.32.33.1412015-11-19 → 2015-11-19 · 4 obs
○ 2015-07-26 02:42:24
● 2015-11-19 13:59:16
○ 2016-02-11 16:28:34
○ 2026-08-03 01:24:16
○A52.36.123.1522016-02-11 → 2016-02-11 · 4 obs
○ 2015-11-19 13:59:16
● 2016-02-11 16:28:34
○ 2016-05-04 21:21:12
○ 2026-08-03 01:24:16
○A52.88.182.1062016-05-04 → 2016-05-04 · 4 obs
○ 2016-02-11 16:28:34
● 2016-05-04 21:21:12
○ 2026-06-27 01:18:24
○ 2026-08-03 01:24:16
○A54.200.70.572015-07-26 → 2015-07-26 · 3 obs
● 2015-07-26 02:42:24
○ 2015-11-19 13:59:16
○ 2026-08-03 01:24:16
○A54.201.192.1842016-02-11 → 2016-02-11 · 4 obs
○ 2015-11-19 13:59:16
● 2016-02-11 16:28:34
○ 2016-05-04 21:21:12
○ 2026-08-03 01:24:16
○A54.68.152.2172016-05-04 → 2016-05-04 · 4 obs
○ 2016-02-11 16:28:34
● 2016-05-04 21:21:12
○ 2026-06-27 01:18:24
○ 2026-08-03 01:24:16
○A54.69.21.2112015-11-19 → 2015-11-19 · 4 obs
○ 2015-07-26 02:42:24
● 2015-11-19 13:59:16
○ 2016-02-11 16:28:34
○ 2026-08-03 01:24:16

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
comg.gtld-servers.net, a.gtld-servers.net, i.gtld-servers.net, k.gtld-servers.net...-
edu.comjosephine.ns.cloudflare.com, sonny.ns.cloudflare.com12 records

✅ Authoritative Response

Server:108.162.195.66

NS records: josephine.ns.cloudflare.com, sonny.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for edu.com (unsigned zone)

⏱️ Timing

Total: 164ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.57.147, 172.67.146.164
AAAA22606:4700:3035::ac43:92a4, 2606:4700:3036::6815:3993
HTTPS1{"priority":1,"target":".","alpn":["h3",

📌 Glue Records Collected

Total: 12

Out-of-bailiwick: 12 (josephine.ns.cloudflare.com, josephine.ns.cloudflare.com, josephine.ns.cloudflare.com...)

Analysis

IP Addresses

isb.edu.com has four IP addresses: 104.21.57.147, 172.67.146.164, 2606:4700:3035::ac43:92a4 and 2606:4700:3036::6815:3993.

Among the host names that share IP numbers with isb.edu.com are eosc.edu.com, host-91-206-27-221.hosteam.pl, gct.edu.com and two others.