Up or NotUp or Not
🌐 Free Network Tool

DNS Lookup & Propagation

Inspect global DNS records including A, AAAA, MX, TXT (SPF/DKIM/DMARC), and NS records for any domain name.

A Records (IPv4)
None found
AAAA Records (IPv6)
None found
MX Records (Mail Exchangers)
None found
TXT Records (SPF, Verification)
None found
Name Servers (NS)
None found

Detect DNS resolution failures and routing downtime automatically.

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DNS Records & Reliability

How long does DNS propagation take?

Depending on TTL (Time-To-Live) cache settings, DNS updates propagate globally between a few minutes and 24 to 48 hours.

Why are TXT records critical for email deliverability?

TXT records store SPF, DKIM, and DMARC policies that prove emails actually originate from your domain, preventing spoofing and spam folder filtering.