Networking and infrastructure28 items
Common TCP and UDP ports
HTTP 80, HTTPS 443, SSH 22, DNS 53 and other ports you meet every day.
DexBase · Look up and compare
Lists for looking up data and comparing options
Find one exact detail without opening scattered pages. Each list combines comparable fields, instant search and filters suited to the subject.
15 available lists
Files and formats40 items
Common file extensions
A quick reference for extensions used in documents, images, audio, video, code and archives.
Web development30 items
HTTP status codes
From 200 OK to 503 Service Unavailable: what each status tells client and server.
Finance and FX46 items
ISO 4217 currency codes: symbols, territories and decimals
Look up currency codes such as USD, EUR and BRL, then understand why a code, a symbol and a displayed amount are different things.
Science and chemistry118 items
Periodic table: 118 elements, symbols and atomic weights
Find elements from hydrogen to oganesson, then see what atomic number, symbols, categories and bracketed values mean.
Science and measurement35 items
SI units
Metre, kilogram, second, ampere and dozens of derived SI units.
U.S. telephony68 items
U.S. area codes
Major North American Numbering Plan area codes for the United States, with state and metro notes.
U.S. geography51 items
U.S. states and capitals
Complete list of U.S. states and D.C. with capital, postal abbreviation and region.
U.S. geography and time12 items
U.S. time zones
Eastern, Central, Mountain, Pacific, Alaska and Hawaii time zones with system identifiers.
World geography245 items
World countries and capitals
Find each capital alongside ISO 2, region and independence flag on one row.
Wealth and economy101 items
100 richest people in the world in 2022
A historical snapshot of the largest fortunes in 2022, with search, country and industry filters, and estimates tied to the Forbes cutoff date.
Geography and telecommunications248 items
Country calling codes and ISO codes
Find each country or territory’s international calling code alongside its ISO alpha-2, ISO alpha-3 and UN M49 identifiers.
Processors44 items
AMD processors
A technical comparison of AMD desktop and workstation CPUs, with exact-model Amazon searches for the U.S. market.
Makeup77 items
Mary Kay foundations
A shade-first guide to Mary Kay's foundation range, with exact-product Amazon searches for U.S. listings.
Graphics cards41 items
NVIDIA GeForce GPUs
A chip-level reference for GeForce graphics cards. Amazon links search the exact GPU model in the U.S. storefront.