DNS Record Lookup
Look up DNS records including A, AAAA, MX, NS, SOA, CNAME, TXT, and CAA records for any domain
Hosting & Network
letter.so runs on Cloudflare, with DNS by Cloudflare and email via Yandex.
- Hosting network
- CloudflareAS13335Cloudflare
- Managed DNS
- Cloudflare
- Yandex
- IPv6 (AAAA)
- Enabled
- CAA pinning
- None
Sits alongside 5,726,397 other sites on Cloudflare. Stable here since we started watching (Oct 20, 2026).
The apex and www are the same hosting — the apex via A records.
DNS Records for letter.so
| Hostname | Type | TTL | Priority | Content |
|---|---|---|---|---|
| letter.so | NS | 0 | arvind.ns.cloudflare.com | |
| letter.so | NS | 0 | sima.ns.cloudflare.com | |
| letter.so | MX | 0 | 10 | mx.yandex.net |
| letter.so | SOA | 1800 | arvind.ns.cloudflare.com dns.cloudflare.com 2416529251 10000 2400 604800 1800 | |
| letter.so | A | 0 | 172.67.216.191 | |
| letter.so | A | 0 | 104.21.24.36 | |
| letter.so | TXT | 0 | t-verify=34e4f5b589f8c06c4f133d182738442e | |
| letter.so | TXT | 0 | brave-ledger-verification=1fc83e7ca315633dbcbfd7374e332057ecd021895def6de6797db151fbcd8813 | |
| letter.so | TXT | 0 | v=spf1 ip4:IP-1 ip4:IP-2 ip4:IP-3 include:_spf.yandex.net ~all | |
| letter.so | TXT | 0 | yandex-verification: c18a7c35f4254b49 | |
| letter.so | TXT | 0 | hubspot-developer-verification=ODU5Y2Y0MjMtZmYzOS00MDFjLTgzNWYtZDUwZTFhOWYxYWIy | |
| letter.so | AAAA | 0 | 2606:4700:3035::ac43:d8bf | |
| letter.so | AAAA | 0 | 2606:4700:3031::6815:1824 | |
| www.letter.so | A | 0 | 172.67.216.191 | |
| www.letter.so | A | 0 | 104.21.24.36 | |
| www.letter.so | AAAA | 0 | 2606:4700:3031::6815:1824 | |
| www.letter.so | AAAA | 0 | 2606:4700:3035::ac43:d8bf |
Get alerted the moment letter.so's DNS changes
This page is today's snapshot. Turn on monitoring and we'll watch letter.so continuously, notifying you the moment anything moves across all three signals:
Uptime
We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.
DNS changes
We watch NS, MX, CAA, CNAME, TXT and A/AAAA records, and identify the host, network, and ASN behind them, so a real migration or hijack stands out from routine noise.
TLS certificate
We warn you 30, 14, 7, and 1 days before it expires, and flag it if the issuing authority changes or the certificate is unexpectedly replaced.
Free for your first domain: uptime, DNS, and certificate together. No credit card.
What's up with DNS →
Our daily roundup of the most interesting DNS changes across the web — hosting and CDN migrations, network moves, and security-config shifts.
Ask about letter.so
BetaAnswers use the live DNS records shown on this page. AI-generated — double-check anything important.
About DNS Records
DNS (Domain Name System) records are instructions that provide information about a domain, including its IP addresses, mail servers, and other services. Common record types include:
- SOA (Start of Authority) - Contains administrative information about the zone
- NS (Nameserver) - Specifies authoritative nameservers for the domain
- A (Address) - Maps a domain to an IPv4 address
- AAAA - Maps a domain to an IPv6 address
- CNAME (Canonical Name) - Creates an alias pointing to another domain
- MX (Mail Exchange) - Specifies mail servers for the domain