(USA) University of Georgia (Popularity: )

Number Theory and Arithmetic Geometry Group. Members, seminars.

(Germany) Technische Universität, Berlin (Popularity: )

Algebra and Number Theory: the KANT group. Members, software (KANT/KASH), publications.

(UK) King's College, University of London (Popularity: )

Number Theory Group. Staff, meetings, preprints.

(USA) University of Illinois at Urbana-Champaign (Popularity: )

Number Theory faculty, visitors, meetings, courses, events.

(USA) Brown University (Popularity: )

Number Theory/Arithmetic Geometry Seminar. Members, meetings.

(UK) Nottingham University (Popularity: )

Number Theory and Arithmetic Geometry research group. Research interests, members, visitors, meetings.

Number Theory Centres (Popularity: )

Listed in the Number Theory Web.

(UK) University of Oxford (Popularity: )

Number Theory Group. Members, publications, meetings.

(USA) University of Texas (Popularity: )

Number Theory Group. Members, meetings, software.

(UK) University of East Anglia (Popularity: )

Number Theory research.

(Poland) Polish Academy of Sciences (Popularity: )

Department of Number Theory. Members, research interests, publications.

(Israel) Ben Gurion University of the Negev (Popularity: )

Number Theory and Algebraic Geometry Research Group. Members, research interest, seminars.

(Croatia) University of Zagreb (Popularity: )

Seminar on Number Theory and Algebra. Members, seminars, links.

(USA) University of South Carolina (Popularity: )

Number Theory Group. Members, research interests, courses, links.

(Austria) Technical University of Graz (Popularity: )

Algorithmic and Probabilistic Number Theory Research Group. Members, research interests.

(Finland) University of Turku (Popularity: )

Number Theory Group. Members, research interests.

(Canada) University of British Columbia (Popularity: )

Number Theory group. Members, research areas and meetings.

(Europe) GTEM: Galois Theory and Explicit Methods in Arithmetic (Popularity: )

Research training network coordinated in Paris, uniting twelve teams from July 2000 until June 2004.

(Canada) McMaster University (Popularity: )

Algebra/Number Theory Seminar. Meetings, abstracts.

(China) Shandong University (Popularity: )

Number theory research group. Members, research interests, courses, events.