dev-ext.britannica.com - robtex.com
dev-ext.britannica.com
| DNSSEC | ⚠️ Not signed | ||||||
| NS | ns-776.awsdns-33.net ⭐ | ||||||
| A | 2600:9000:5303:800::1🇺🇸 Amazon2600:9000:5303::/48 - CloudFront | ||||||
| PTR | ns-776.awsdns-33.net | ||||||
| A | 205.251.195.8🇺🇸 Amazon205.251.195.0/24 prefix | ||||||
| PTR | ns-776.awsdns-33.net | ||||||
| NS | ns-1033.awsdns-01.org | ||||||
| A | 2600:9000:5304:900::1🇺🇸 Amazon2600:9000:5304::/48 - CloudFront | ||||||
| PTR | ns-1033.awsdns-01.org | ||||||
| A | 205.251.196.9🇺🇸 Amazon205.251.196.0/24 prefix | ||||||
| PTR | ns-1033.awsdns-01.org | ||||||
| NS | ns-1790.awsdns-31.co.uk | ||||||
| A | 2600:9000:5306:fe00::1🇺🇸 Amazon2600:9000:5306::/48 - CloudFront | ||||||
| PTR | ns-1790.awsdns-31.co.uk | ||||||
| A | 205.251.198.254🇺🇸 Amazon205.251.198.0/24 prefix | ||||||
| PTR | ns-1790.awsdns-31.co.uk | ||||||
| NS | ns-28.awsdns-03.com | ||||||
| A | 2600:9000:5300:1c00::1🇺🇸 Amazon2600:9000:5300::/48 - CloudFront | ||||||
| PTR | ns-28.awsdns-03.com | ||||||
| A | 205.251.192.28🇺🇸 Amazon205.251.192.0/24 prefix | ||||||
| PTR | ns-28.awsdns-03.com | ||||||
| SOA | ns-776.awsdns-33.netawsdns-hostmaster@amazon.com serial=1 | ||||||
britannica.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 44.218.239.206🇺🇸 Amazon44.192.0.0/11 EC2 IAD prefix | ||||||
| A | 75.101.134.206🇺🇸 Amazon75.101.128.0/17 Execution Services | ||||||
| NS | ns-243.awsdns-30.com ⭐ | ||||||
| NS | ns-1050.awsdns-03.org | ||||||
| NS | ns-1567.awsdns-03.co.uk | ||||||
| NS | ns-829.awsdns-39.net | ||||||
| TXT | ca3-34d513380a624c15b1894f20512d2ca8 | ||||||
| TXT | ca3-5187b5f7e89c48ce9ac11ac4ad4ba681 | ||||||
| TXT | facebook-domain-verification=yx5oj1072bsq69m7blcnrkktdu6h4h | ||||||
| TXT | google-site-verification=3qlcdPLjaLxZmTfGmv2-7hXoRu7HWw7Sx--a2KgIoN0 | ||||||
| TXT | google-site-verification=iCsMOBxTnqow6GNvW0LQ292qIMjLqMXwpQ6tOfIZgY4 | ||||||
| TXT | google-site-verification=k10aAIZQu5EjFbrh-ABW-9q9phYyigXf-211snaxdg4 | ||||||
| TXT | v=spf1 include:_spf.google.com exists:%{i}._spf.sparkpostmail.com ~all | ||||||
| SOA | ns-243.awsdns-30.comawsdns-hostmaster@amazon.com serial=1 | ||||||
rank #212 globally
rank #137 in the tld
This domain "britannica.com" is owned by Encyclopædia Britannica, Inc., a renowned British publication company. The website offers access to a comprehensive online encyclopedia, with articles and resources covering a wide range of topics such as history, science, technology, arts, and more. It serves as a reliable source of knowledge for students, educators, and general readers worldwide.WOT: SAFE (93/100)
📈 Tranco rank: #610
Encyclopædia Britannica
britannica.com is the online home of Encyclopædia Britannica, one of the oldest and most respected general knowledge encyclopedias in the English language, founded in 1768 in Edinburgh, Scotland. Today it operates as a comprehensive digital reference platform offering hundreds of thousands of expert-written articles, biographies, videos, and images.
Products & Services
- Online Encyclopedia — Expert-curated articles across history, science, geography, arts, biographies, and more
- Britannica Kids — Age-appropriate educational content for children
- ProCon — Balanced pro/con arguments on controversial topics to promote critical thinking
- Britannica Money — Financial education covering investing, retirement, and household finance
- Interactive Learning — Quizzes, games, and educational videos
The platform operates on a freemium model with premium subscription access to the full database.
Technical Infrastructure
| Component | Details | |
|---|---|---|
| Hosting | Amazon Web Services (AWS) | |
| IPv4 | 98.87.74.78, 100.50.177.255 | |
| Nameservers | AWS Route 53 (ns-243.awsdns-30.com, ns-829.awsdns-39.net, ns-1050.awsdns-03.org, ns-1567.awsdns-03.co.uk) | |
SparkPost (include:sparkpostmail.com) | ||
| DNSSEC | Not enabled |
Domain verification records indicate integrations with Google and Facebook services.
Subdomains
mendel-dev.dev-ext.britannica.com |
mendel-qa.dev-ext.britannica.com |
Similar names
DNS History
4 records (4 active, 0 former)
●NSns-1033.awsdns-01.org2026-03-22 → 2026-03-30 · 2 obs
● 2026-03-30 06:52:44
●NSns-1790.awsdns-31.co.uk2026-03-22 → 2026-03-30 · 2 obs
● 2026-03-30 06:52:44
●NSns-28.awsdns-03.com2026-03-22 → 2026-03-30 · 2 obs
● 2026-03-30 06:52:44
●NSns-776.awsdns-33.net2026-03-22 → 2026-03-30 · 2 obs
● 2026-03-30 06:52:44
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | i.gtld-servers.net, f.gtld-servers.net, l.gtld-servers.net, d.gtld-servers.net... | - |
| britannica.com | ns-243.awsdns-30.com, ns-829.awsdns-39.net, ns-1567.awsdns-03.co.uk, ns-1050.awsdns-03.org | 1 record |
| dev-ext.britannica.com | ns-1033.awsdns-01.org, ns-1790.awsdns-31.co.uk, ns-28.awsdns-03.com, ns-776.awsdns-33.net | - |
✅ Authoritative Response
Server:205.251.192.28
NS records: ns-1033.awsdns-01.org, ns-1790.awsdns-31.co.uk, ns-28.awsdns-03.com, ns-776.awsdns-33.net
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for britannica.com (unsigned zone)
⏱️ Timing
Total: 490ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 4 | ns-1033.awsdns-01.org, ns-1790.awsdns-31.co.uk... |
| SOA | 1 | ns-776.awsdns-33.net awsdns-hostmaster.a |
📌 Glue Records Collected
Total: 1
Out-of-bailiwick: 1 (ns-243.awsdns-30.com)
Analysis
Hierarchy
dev-ext.britannica.com is a parent of mendel-dev.dev-ext.britannica.com and mendel-qa.dev-ext.britannica.com.
Name Servers
dev-ext.britannica.com is delegated to four name servers: ns-28.awsdns-03.com, ns-776.awsdns-33.net, ns-1033.awsdns-01.org and ns-1790.awsdns-31.co.uk.
dev-ext.britannica.com at least partially shares name servers with other domains, for instance alkomprar.com, blizzardall-stars.sg, calamansi.ph, goci.io and china-acm.com.
These name servers are commonly used with the following name servers: ns-1116.awsdns-11.org, ns-225.awsdns-28.com, ns-836.awsdns-40.net, ns-1935.awsdns-49.co.uk, ns-1483.awsdns-57.org, ns-1601.awsdns-08.co.uk, ns1.domainstocks.org, ns2.domainstocks.org, ns3.domainstocks.org and ns4.domainstocks.org.
Host names with two IP numbers:
ns-28.awsdns-03.com points to 2600:9000:5300:1c00::1 and 205.251.192.28; ns-776.awsdns-33.net points to 2600:9000:5303:800::1 and 205.251.195.8; ns-1033.awsdns-01.org points to 2600:9000:5304:900::1 and 205.251.196.9; ns-1790.awsdns-31.co.uk points to 2600:9000:5306:fe00::1 and 205.251.198.254.