mail.cupdf.com - robtex.com

mail.cupdf.com

DNSSEC⚠️ Not signed
A2606:4700:3034::6815:476e🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3034::ac43:907c🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.71.110Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.144.124🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4104.21.71.110, 172.67.144.124
IPv62606:4700:3034::6815:476e, 2606:4700:3034::ac43:907c

cupdf.com

DNSSEC⚠️ Not signed
A2606:4700:3034::6815:476e🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3034::ac43:907c🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.71.110Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.144.124🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSathena.ns.cloudflare.com ⭐
NSnick.ns.cloudflare.com
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4104.21.71.110, 172.67.144.124
IPv62606:4700:3034::6815:476e, 2606:4700:3034::ac43:907c
SOAathena.ns.cloudflare.comdns@cloudflare.com serial=2398786127
rank #351581 globally
rank #155998 in the tld
📈 Tranco rank: #146,233

Previously MX for

cupdf.com

Same first word

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DNS History

5 records (4 active, 1 former)

201820192020202120222023202420252026A104.21.71.110172.67.144.1242606:4700:3034::6815:476e2606:4700:3034::ac43:907c166.62.28.109
●A104.21.71.1102026-02-19 → 2026-03-22 · 3 obs
○ 2017-02-10 02:13:02
● 2026-02-19 09:29:00
● 2026-03-22 19:34:42
○A166.62.28.1092017-02-10 → 2017-02-10 · 3 obs
● 2017-02-10 02:13:02
○ 2026-02-19 09:29:00
○ 2026-03-22 19:34:42
●A172.67.144.1242026-02-19 → 2026-03-22 · 3 obs
○ 2017-02-10 02:13:02
● 2026-02-19 09:29:00
● 2026-03-22 19:34:42
●A2606:4700:3034::6815:476e2026-02-19 → 2026-03-22 · 3 obs
○ 2017-02-10 02:13:02
● 2026-02-19 09:29:00
● 2026-03-22 19:34:42
●A2606:4700:3034::ac43:907c2026-02-19 → 2026-03-22 · 3 obs
○ 2017-02-10 02:13:02
● 2026-02-19 09:29:00
● 2026-03-22 19:34:42

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coma.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...-
cupdf.comnick.ns.cloudflare.com, athena.ns.cloudflare.com12 records

✅ Authoritative Response

Server: 108.162.192.72

NS records: nick.ns.cloudflare.com, athena.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for cupdf.com (unsigned zone)

⏱️ Timing

Total: 85ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.144.124, 104.21.71.110
AAAA22606:4700:3034::ac43:907c, 2606:4700:3034::6815:476e
HTTPS1{"priority":1,"target":".","alpn":["h3",

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

mail.cupdf.com points to four IP numbers: 2606:4700:3034::6815:476e, 2606:4700:3034::ac43:907c, 104.21.71.110 and 172.67.144.124.

For instance, other host names lp.bdmcommunity.com, boscuan77an.com, sgpoppers.com, bravozero.com and thobez.co.uk share IP numbers with mail.cupdf.com.