`recruiting.piazza.com`

DNSSEC	⚠️ Not signed
A	3.89.34.107^{🇺🇸 Amazon3.80.0.0/12 EC2 IAD prefix}
		PTR	`ec2-3-89-34-107.compute-1.amazonaws.com`
A	3.220.192.166^{🇺🇸 Amazon3.208.0.0/12 EC2 IAD prefix}
A	54.157.30.75^{🇺🇸 Amazon54.156.0.0/14 EC2 IAD prefix}

`piazza.com`

	DNSSEC	⚠️ Not signed
	A	3.89.34.107^{🇺🇸 Amazon3.80.0.0/12 EC2 IAD prefix}
	A	3.220.192.166^{🇺🇸 Amazon3.208.0.0/12 EC2 IAD prefix}
	A	54.157.30.75^{🇺🇸 Amazon54.156.0.0/14 EC2 IAD prefix}
	NS	`ns-74.awsdns-09.com` ⭐
	NS	`ns-1360.awsdns-42.org`
	NS	`ns-1868.awsdns-41.co.uk`
	NS	`ns-987.awsdns-59.net`
	MX	`piazza-com.mail.protection.outlook.com` ⭐
	TXT	`apple-domain-verification=NvgAGTreJ9br6TT3`
	TXT	`google-site-verification=vP_7vShksrvqA6VobTihMByOMO-jlUzs59fLoyKIrQU`
	TXT	`v=spf1 a mx include:u5126.wl127.sendgrid.net include:spf.protection.outlook.c...`
	SOA	`ns-74.awsdns-09.com`awsdns-hostmaster@amazon.com serial=1

WOT: SAFE (93/100)
rank #87046 globally
rank #39034 in the tld
WOT: SAFE (93/100)
📈 Tranco rank: #49,350

Same first word

DNS History

7 records (3 active, 4 former)

●A3.220.192.1662026-03-14 → 2026-03-14 · 2 obs

○ 2017-01-23 08:44:22
● 2026-03-14 06:34:06

●A3.89.34.1072026-03-14 → 2026-03-14 · 2 obs

○ 2017-01-23 08:44:22
● 2026-03-14 06:34:06

○A52.200.184.792026-03-14 → 2026-03-14 · 1 obs

○ 2026-03-14 06:34:06

○A52.72.41.432026-03-14 → 2026-03-14 · 1 obs

○ 2026-03-14 06:34:06

●A54.157.30.752026-03-14 → 2026-03-14 · 2 obs

○ 2017-01-23 08:44:22
● 2026-03-14 06:34:06

○A54.221.201.742026-03-14 → 2026-03-14 · 1 obs

○ 2026-03-14 06:34:06

○A54.225.228.2472017-01-23 → 2017-01-23 · 2 obs

● 2017-01-23 08:44:22
○ 2026-03-14 06:34:06

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
piazza.com	ns-74.awsdns-09.com, ns-987.awsdns-59.net, ns-1868.awsdns-41.co.uk, ns-1360.awsdns-42.org	1 record

✅ Authoritative Response

Server: 205.251.192.74

NS records: ns-74.awsdns-09.com, ns-987.awsdns-59.net, ns-1868.awsdns-41.co.uk, ns-1360.awsdns-42.org

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for piazza.com (unsigned zone)

⏱️ Timing

Total: 587ms | Queries: -

📄 Records

Type	Count	Sample Data
A	3	`3.220.192.166, 3.89.34.107...`

📌 Glue Records Collected

Total: 1

Out-of-bailiwick: 1 (ns-74.awsdns-09.com)

Analysis

IP Addresses

recruiting.piazza.com resolves to three IP numbers: 3.89.34.107, 3.220.192.166 and 54.157.30.75.

Other host names share IP numbers with recruiting.piazza.com; for instance piazza.com.

recruiting.piazza.com - robtex.com