mail.usps.us.org - robtex.com

mail.usps.us.org

DNSSEC⚠️ Not signed
A18.219.54.33🇺🇸 Amazon18.216.0.0/14 EC2 CMH prefix
PTRec2-18-219-54-33.us-east-2.compute.amazonaws.com

usps.us.org

DNSSEC⚠️ Not signed
A2606:4700:3034::ac43:b8ec🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::6815:131f🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.19.31Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.184.236🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSernest.ns.cloudflare.com ⭐
NSkarina.ns.cloudflare.com
MXmail.usps.us.org ⭐
HTTPSHTTP/2 ✓ hints match
IPv4 hints104.21.19.31, 172.67.184.236
IPv6 hints2606:4700:3034::ac43:b8ec, 2606:4700:3037::6815:131f
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=15, name=cloudflare-ech.com
SOAernest.ns.cloudflare.comdns@cloudflare.com serial=2410201072
⚠️ On DNS blocklist: tif

MX for

usps.us.org

Same first word

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DNS History

1 record (1 active, 0 former)

A18.219.54.33
●A18.219.54.332026-08-04 → 2026-08-05 · 2 obs
● 2026-08-04 15:24:50
● 2026-08-05 10:40:36

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
orgb2.org.afilias-nst.org, d0.org.afilias-nst.org, b0.org.afilias-nst.org-
us.orgns2.centralnic.net, ns1.centralnic.net, ns4.centralnic.net, ns3.centralnic.net-
usps.us.orgkarina.ns.cloudflare.com, ernest.ns.cloudflare.com-

✅ Authoritative Response

Server:173.245.58.178

NS records: karina.ns.cloudflare.com, ernest.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for usps.us.org (unsigned zone)

⏱️ Timing

Total: 410ms | Queries: -

📄 Records

TypeCountSample Data
A118.219.54.33

Analysis

Mail Server Role

usps.us.org uses mail.usps.us.org as a mail server.

IP Addresses

mail.usps.us.org resolves to one IP address: 18.219.54.33.

mail.omseti.com, _dc-mx.b51ccbf4b192.whonki.com, mail.iltaa.com and two other host names share IP numbers with mail.usps.us.org.