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- Aonaware Dictionary
- arXiv
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- Big Huge Thesaurus
- CatalogWS
- City and State by Zip Code
- Comprehensive Knowledge Archive Network
- Cortera
- Cortera Business Vitals
- CrunchBase
- DBpedia
- Dun and Bradstreet Business Verification
- Dun and Bradstreet Credit Check
- DuoShare Address Verification
- Email Address Validator
- Freebase
- FUTEF Wikipedia API
- Goodreads
- Google Book Search Data
- Holidays Service
- iheartquotes
- Internet Archive
- KnowMarkets Address Verification
- Library of Congress SRW
- Library of Congress Subject Headings
- LibraryThing
- Microsoft MSDN
- New York Times Campaign Finance
- Office for National Statistics
- Open Library
- OpenDOAR
- PhoneVal
- PilotOutlook
- Postcode Anywhere
- Pushpin Location Data
- Qualified Address
- RealEDA Reverse Phone Lookup
- Science Museum
- Scopus
- SRC Demographics
- StrikeIron Address Verfication
- StrikeIron Do Not Call
- StrikeIron Insider Trading
- StrikeIron Lite Web Services
- StrikeIron Phone Number Enhancement
- StrikeIron Residential Lookup
- StrikeIron Reverse Phone Lookup
- StrikeIron Sales Tax Basic
- StrikeIron Super Data Pack
- StrikeIron Tax Service
- StrikeIron US Addresses
- StrikeIron US Census
- StrikeIron Zacks Company Profile
- UPC Database
- UrbanDictionary
- US Yellow Pages
- WhitePages.com
- WikiMatrix
- Wikipedia
- World Bank
- WorldCat Identities
- WorldCat Search
- Yahoo Answers
- Yes Broadcast DB
- YouPage
- ZipCodes
- ZoomInfo
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