`sum.isi.edu`

DNSSEC	⚠️ Not signed
A	2001:1878:400:1:0:8009:a0e0:0^{🇺🇸 Los-Nettos2001:1878::/32 Los Nettos}
		PTR	`sum.isi.edu`
A	128.9.160.224^{🇺🇸 ISI128.9.160.0/20}

`isi.edu`

	DNSSEC	⚠️ Not signed
	A	141.193.213.20^{🇺🇸 CLOUDFLARESPECTRUM141.193.213.0/24 WPEngine, Inc. 504 Lavaca Street, 1000, Austin, TX 78701, US}
	A	141.193.213.21^{🇺🇸 CLOUDFLARESPECTRUM141.193.213.0/24 WPEngine, Inc. 504 Lavaca Street, 1000, Austin, TX 78701, US}
	NS	`mdrinfoblox-gm01.ads.isi.edu` ⭐
	NS	`ns2.isi.edu`
	NS	`ns3.isi.edu`
	NS	`ns4.isi.edu`
	MX	`mxa-006c3502.gslb.gpphosted.com` ⭐
	MX	`mxb-006c3502.gslb.gpphosted.com` ⭐
	TXT	`OSSRH-90447`
	TXT	`_3ji0kq2cjlddas4tqi3mbon3xjhhxps`
	TXT	`apple-domain-verification=5FZgJkmHEGYFXkSg`
	TXT	`docusign=55f9b41e-27b7-49e4-af9e-c11b83854c61`
	TXT	`tgHn89inYU4zTEMfv0T+jS8XykcPIsqF6+lvfjStaf639eXGhSSOSdNlSW/qss6Up3dPCv+X6+8gZ...`
	TXT	`infoblox-domain-mastery=9c12fcf7c63542b120c0636e2605be7f76b23c4fb830989083452...`
	TXT	`atlassian-domain-verification=aNYeVhAS9Ogdeh/aU4x04/fQ9ElE8q0NlhcTa2xB/Ze6113...`
	TXT	`v=spf1 a mx a:ant.isi.edu a:hmail.jitbit.com a:hmail2.jitbit.com ip4:209.85.1...`
	SOA	`mdrinfoblox-gm01.ads.isi.edu`hostmaster@dev.null serial=2022825752

WOT: SAFE (93/100)
rank #8093 globally
rank #267 in the tld
WOT: SAFE (93/100)
📈 Tranco rank: #18,000

PTR for

0.0.0.0.0.e.0.a.9.0.0.8.0.0.0.0.1.0.0.0.0.0.4.0.8.7.8.1.1.0.0.2.ip6.arpa

224.160.9.128.in-addr.arpa

Same first word

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DNS History

2 records (2 active, 0 former)

●A128.9.160.2242015-08-11 → 2026-05-11 · 2 obs

● 2015-08-11 09:19:18
● 2026-05-11 15:33:24

●A2001:1878:400:1:0:8009:a0e0:02015-08-11 → 2026-05-11 · 2 obs

● 2015-08-11 09:19:18
● 2026-05-11 15:33:24

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
edu	a.edu-servers.net, k.edu-servers.net, e.edu-servers.net, c.edu-servers.net...	14 records
isi.edu	ns2.isi.edu, ns4.isi.edu, ns3.isi.edu	3 records

✅ Authoritative Response

Server:128.9.40.13

NS records: ns2.isi.edu, ns4.isi.edu, ns3.isi.edu

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 287ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`128.9.160.224`
AAAA	1	`2001:1878:400:1:0:8009:a0e0:0`

📌 Glue Records Collected

Total: 17

In-bailiwick: 3 (ns2.isi.edu, ns4.isi.edu, ns3.isi.edu)

Out-of-bailiwick: 14 (m.edu-servers.net, l.edu-servers.net, k.edu-servers.net...)

Analysis

IP Addresses

sum.isi.edu points to two IP numbers: 2001:1878:400:1:0:8009:a0e0:0 and 128.9.160.224.

sum.isi.edu - robtex.com

sum.isi.edu

isi.edu