codex-web.duckdns.org - robtex.com
codex-web.duckdns.org
| DNSSEC | ⚠️ Not signed | ||||||
| A | 45.61.49.149🇺🇸 AS5491345.61.49.0/24 315 Madison Ave. New York City NY 10017 United States | ||||||
| MX | codex-web.duckdns.org ⭐ | ||||||
| A | 45.61.49.149🇺🇸 AS5491345.61.49.0/24 315 Madison Ave. New York City NY 10017 United States | ||||||
duckdns.org
| DNSSEC | ⚠️ Not signed | ||||||
| A | 3.99.11.126🇨🇦 Amazon3.98.0.0/15 EC2 YUL prefix | ||||||
| NS | ns1.duckdns.org ⭐ | ||||||
| NS | ns2.duckdns.org | ||||||
| NS | ns3.duckdns.org | ||||||
| NS | ns4.duckdns.org | ||||||
| NS | ns5.duckdns.org | ||||||
| NS | ns6.duckdns.org | ||||||
| NS | ns7.duckdns.org | ||||||
| NS | ns8.duckdns.org | ||||||
| NS | ns9.duckdns.org | ||||||
| MX | smtp.google.com ⭐ | ||||||
| TXT | google-site-verification=D-6gaVUztvrU5uB_hbdBs3hAL9zswN_qHCJoOLIbU54 | ||||||
| SOA | ns1.duckdns.orghostmaster@duckdns.org 2026-09-07 #2 | ||||||
rank #504 in the tld
📈 Tranco rank: #284
DuckDNS - Free Dynamic DNS Service
DuckDNS is a free dynamic DNS (DDNS) service that allows users to map a subdomain underduckdns.orgto their dynamically changing IP address. This is particularly useful for home servers, IoT devices, and self-hosted services where the ISP assigns a new IP address periodically. The service is entirely free with no paid tiers—operational costs are covered through optional donations via Patreon and Bitcoin.
Key Features
- Free dynamic DNS with subdomains like
yourname.duckdns.org - Simple HTTP/HTTPS API for updating IP addresses (works with scripts, routers, and IoT devices)
- Automatic IP detection when no IP is specified in the update request
- Custom domain support via CNAME records pointing to your DuckDNS subdomain
- Multiple authentication options: Google, GitHub, Twitter (Reddit login discontinued due to legal request)
- Minimal data collection: only stores email, IP, token, domains, and target IPs
Technical Infrastructure
- Hosted entirely on AWS (Amazon Web Services)
- Primary server: 15.223.156.67 (AWS Canada - ca-central-1)
- 9 nameservers (ns1-ns9.duckdns.org), all on AWS Canada infrastructure
- Mail: Handled by Amazon SES (inbound-smtp.us-west-2.amazonaws.com)
- DNSSEC: Not signed
- IPv6: Detection not currently supported due to AWS VPC limitations
History & Community
DuckDNS was created by a small team who wanted a simple, reliable DDNS service for their own use. The project operates at minimal cost by leveraging AWS infrastructure efficiently. It has gained recognition in the self-hosting community and was recommended by Gnu Tomorrow as a quality free DDNS option. The service maintains an active community through Google Groups for support and discussion.
MX for
codex-web.duckdns.org |
Same first word
codex-web.com |
codex-web.duckdns.org |
Similar names
DNS History
2 records (2 active, 0 former)
●MXcodex-web.duckdns.org2026-07-04 → 2026-07-26 · 2 obs
● 2026-07-26 16:20:32
●A45.61.49.1492026-07-04 → 2026-07-26 · 2 obs
● 2026-07-26 16:20:32
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| org | b0.org.afilias-nst.org, d0.org.afilias-nst.org, b2.org.afilias-nst.org | - |
| duckdns.org | ns1.duckdns.org, ns2.duckdns.org, ns3.duckdns.org, ns4.duckdns.org... | 9 records |
✅ Authoritative Response
Server:15.222.19.97
NS records: ns1.duckdns.org, ns2.duckdns.org, ns3.duckdns.org, ns4.duckdns.org, ns5.duckdns.org, ns6.duckdns.org, ns7.duckdns.org, ns8.duckdns.org, ns9.duckdns.org
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for duckdns.org (unsigned zone)
⏱️ Timing
Total: 189ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 45.61.49.149 |
| MX | 1 | codex-web.duckdns.org (pri: 50) |
| TXT | 1 | |
📌 Glue Records Collected
Total: 9
In-bailiwick: 9 (ns1.duckdns.org, ns2.duckdns.org, ns3.duckdns.org...)
Analysis
Mail Server Role
codex-web.duckdns.org acts as its own mail server.
IP Addresses
codex-web.duckdns.org points to a single IP number: 45.61.49.149.
Among the host names that share IP numbers with codex-web.duckdns.org is claudecode-web.duckdns.org, as one example.
Mail Servers
codex-web.duckdns.org has a single mail server: codex-web.duckdns.org itself.
codex-web.duckdns.org resolves to 45.61.49.149 and no other IP number.