`api.chairbook92.com`

DNSSEC	⚠️ Not signed
A	2606:4700:4408::ac40:9118^{🇺🇸 Cloudflare2606:4700:4408::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2a06:98c1:3108::6812:2ae8^{🇺🇸 Cloudflare2a06:98c1:3108::/48} ✓ In HTTPS hints
A	104.18.42.232^{Cloudflare104.18.42.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.64.145.24^{🇺🇸 Cloudflare172.64.145.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
HTTPS	HTTP/2 ✓ hints match
		IPv4 hints	104.18.42.232, 172.64.145.24
		IPv6 hints	2606:4700:4408::ac40:9118, 2a06:98c1:3108::6812:2ae8

`chairbook92.com`

DNSSEC	⚠️ Not signed
A	2606:4700:4408::ac40:9118^{🇺🇸 Cloudflare2606:4700:4408::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2a06:98c1:3108::6812:2ae8^{🇺🇸 Cloudflare2a06:98c1:3108::/48} ✓ In HTTPS hints
A	104.18.42.232^{Cloudflare104.18.42.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.64.145.24^{🇺🇸 Cloudflare172.64.145.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`dale.ns.cloudflare.com` ⭐
NS	`dawn.ns.cloudflare.com`
HTTPS	HTTP/2 ✓ hints match
		IPv4 hints	104.18.42.232, 172.64.145.24
		IPv6 hints	2606:4700:4408::ac40:9118, 2a06:98c1:3108::6812:2ae8
SOA	`dale.ns.cloudflare.com`dns@cloudflare.com serial=2404015360

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DNS History

4 records (4 active, 0 former)

●A104.18.42.2322026-05-11 → 2026-05-12 · 2 obs

● 2026-05-11 19:40:30
● 2026-05-12 13:02:14

●A172.64.145.242026-05-11 → 2026-05-12 · 2 obs

● 2026-05-11 19:40:30
● 2026-05-12 13:02:14

●A2606:4700:4408::ac40:91182026-05-11 → 2026-05-12 · 2 obs

● 2026-05-11 19:40:30
● 2026-05-12 13:02:14

●A2a06:98c1:3108::6812:2ae82026-05-11 → 2026-05-12 · 2 obs

● 2026-05-11 19:40:30
● 2026-05-12 13:02:14

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
chairbook92.com	dawn.ns.cloudflare.com, dale.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.193.95

NS records: dawn.ns.cloudflare.com, dale.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for chairbook92.com (unsigned zone)

⏱️ Timing

Total: 116ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.64.145.24, 104.18.42.232`
AAAA	2	`2606:4700:4408::ac40:9118, 2a06:98c1:3108::6812:2ae8`
HTTPS	1	`{"priority":1,"target":".","alpn":["h2"]`

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

api.chairbook92.com refers to four IP numbers: 2606:4700:4408::ac40:9118, 2a06:98c1:3108::6812:2ae8, 104.18.42.232 and 172.64.145.24.

Other host names including formansettlement.com, chairbook92.com, mycourses.cty.jhu.edu.cdn.cloudflare.net and psasignup.com share IP numbers with api.chairbook92.com.

api.chairbook92.com - robtex.com