api.crossref.org - dns.ninja

`api.crossref.org`

DNSSEC	⚠️ Not signed
A	52.70.163.36^{🇺🇸 Amazon52.70.0.0/15 EC2 IAD prefix}
		PTR	`ec2-52-70-163-36.compute-1.amazonaws.com`
A	54.83.13.125^{🇺🇸 Amazon54.80.0.0/14 EC2 IAD prefix}
A	100.29.6.95^{🇺🇸 Amazon100.24.0.0/13 EC2 IAD prefix}
A	100.49.188.5^{🇺🇸 Amazon100.48.0.0/12 EC2 IAD prefix}

`crossref.org`

	DNSSEC	⚠️ Not signed
	A	32.193.126.239
	A	52.200.31.254^{🇺🇸 Amazon52.200.0.0/13 EC2 IAD prefix}
	A	54.175.2.164^{🇺🇸 Amazon54.174.0.0/15 EC2 IAD prefix}
	A	100.62.15.43^{🇺🇸 Amazon100.48.0.0/12 EC2 IAD prefix}
	NS	`ns-1052.awsdns-03.org` ⭐
	NS	`ns-1629.awsdns-11.co.uk`
	NS	`ns-473.awsdns-59.com`
	NS	`ns-659.awsdns-18.net`
	MX	`aspmx.l.google.com` ⭐
	MX	`aspmx3.googlemail.com` ⭐
	MX	`alt1.aspmx.l.google.com`⁽²⁰⁾
	MX	`alt2.aspmx.l.google.com`⁽²⁰⁾
	MX	`aspmx2.googlemail.com`⁽³⁰⁾
	TXT	`1wnqjfbqpgk7rry20dzzcqmm0fhqpdwm`
	TXT	`MS=ms40313232`
	TXT	`intacct-esk=4FED1A49C4B8865AE053DF06A8C02878`
	TXT	`status-page-domain-verification=pmfyw22rmcg9`
	TXT	`v=spf1 ip4:208.254.38.64/27 ip4:108.26.163.24 ip4:18.233.120.246 include:mail...`
	SOA	`ns-1052.awsdns-03.org`awsdns-hostmaster@amazon.com serial=1

WOT: SAFE (66/100)
rank #3480 globally
rank #427 in the tld
WOT: SAFE (83/100)
📈 Tranco rank: #8,329

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DNS History

13 records (4 active, 9 former)

●A100.29.6.952026-08-07 → 2026-08-07 · 3 obs

○ 2026-03-28 09:33:38
● 2026-08-07 01:19:56
● 2026-08-07 16:51:34

●A100.49.188.52026-08-07 → 2026-08-07 · 3 obs

○ 2026-03-28 09:33:38
● 2026-08-07 01:19:56
● 2026-08-07 16:51:34

○A208.254.38.722017-06-20 → 2017-06-20 · 3 obs

● 2017-06-20 03:07:42
○ 2026-03-28 09:33:38
○ 2026-08-07 16:51:34

○A3.229.131.202026-03-28 → 2026-08-07 · 2 obs

○ 2026-03-28 09:33:38
○ 2026-08-07 16:51:34

○A34.226.66.1332026-03-28 → 2026-08-07 · 2 obs

○ 2026-03-28 09:33:38
○ 2026-08-07 16:51:34

○A34.234.221.772026-03-28 → 2026-03-28 · 4 obs

○ 2017-06-20 03:07:42
● 2026-03-28 09:33:38
○ 2026-08-07 01:19:56
○ 2026-08-07 16:51:34

○A44.193.178.2442026-03-28 → 2026-03-28 · 4 obs

○ 2017-06-20 03:07:42
● 2026-03-28 09:33:38
○ 2026-08-07 01:19:56
○ 2026-08-07 16:51:34

○A44.221.188.2182026-03-28 → 2026-08-07 · 2 obs

○ 2026-03-28 09:33:38
○ 2026-08-07 16:51:34

○A52.7.197.1282026-03-28 → 2026-03-28 · 4 obs

○ 2017-06-20 03:07:42
● 2026-03-28 09:33:38
○ 2026-08-07 01:19:56
○ 2026-08-07 16:51:34

●A52.70.163.362026-08-07 → 2026-08-07 · 3 obs

○ 2026-03-28 09:33:38
● 2026-08-07 01:19:56
● 2026-08-07 16:51:34

○A54.157.38.1232026-03-28 → 2026-03-28 · 4 obs

○ 2017-06-20 03:07:42
● 2026-03-28 09:33:38
○ 2026-08-07 01:19:56
○ 2026-08-07 16:51:34

●A54.83.13.1252026-08-07 → 2026-08-07 · 3 obs

○ 2026-03-28 09:33:38
● 2026-08-07 01:19:56
● 2026-08-07 16:51:34

○A54.92.157.2132026-03-28 → 2026-08-07 · 2 obs

○ 2026-03-28 09:33:38
○ 2026-08-07 16:51:34

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	b0.org.afilias-nst.org, b2.org.afilias-nst.org, d0.org.afilias-nst.org	-
crossref.org	ns-473.awsdns-59.com, ns-1052.awsdns-03.org, ns-659.awsdns-18.net, ns-1629.awsdns-11.co.uk	2 records

✅ Authoritative Response

Server:205.251.194.147

NS records: ns-473.awsdns-59.com, ns-1052.awsdns-03.org, ns-659.awsdns-18.net, ns-1629.awsdns-11.co.uk

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for crossref.org (unsigned zone)

⏱️ Timing

Total: 399ms | Queries: -

📄 Records

Type	Count	Sample Data
A	4	`100.49.188.5, 52.70.163.36...`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns-1052.awsdns-03.org, ns-1052.awsdns-03.org)

Analysis

IP Addresses

api.crossref.org has four IP addresses: 52.70.163.36, 54.83.13.125, 100.29.6.95 and 100.49.188.5.