- British Gas http://www.house.co.uk
- British Telecom http://www.bt.com
- First Capital Connect Railway http://www.firstcapitalconnect.co.uk
- Gardiner Design Associates http://www.gardinerdesign.co.uk
- Great North Eastern Railway http://www.gner.co.uk
- Hatfield House and Park http://www.hatfield-house.co.uk
- Hatfield Town Council http://www.hatfield-herts.gov.uk
- Hertfordshire http://www.hertfordshire.com
- Hertfordshire County Council http://www.hertsdirect.org
- Hertfordshire Travel Information http://www.intalink.org.uk
- NTL http://www.ntlworld.com
- Ofsted http://www.ofsted.gov.uk
- Powergen http://www.powergen.co.uk
- Profesional Solutions http://www.prosolutions.co.uk
- Royal Mail – redirection and post codes http://www.royalmail.com
- Three Valleys Water http://www.3valleyswater.co.uk
- University of Hertfordshire http://www.herts.ac.uk
- Welwyn Hatfield Council http://www.welhat.gov.uk