Last.fm Friendship Network (December 2010, Syracuse Data Lab)
The Last.fm friendship network of the Data Lab Social Computing Data Repository (Syracuse University): Last.fm, a music website founded in the United Kingdom in 2002. The network was crawled in December 2010 by Megan Kearl. This copy holds 5,115,300 directed links, each from a user to a friend of that user (the readme: the line 1,2 means user 1 is friend with user 2), among 1,191,812 distinct users, and a list of 108,493 user numbers (nodes.csv). Users are numbers; the files hold no names or profile data.
Cite this dataset at
lastfm-friendship-2010.echo.directory
Analytics
The full graph has 1,193,699 nodes; this view shows the 1,000-node sample the pipeline drew for display. Node size is centrality, colour is community.
Record
- Catalog key
lastfm-syr- Authors
- Kearl, Megan; Zafarani, Reza; Liu, Huan
- Year
- 2010
- Source paper
- Last.fm Friendship Network Dataset
- License
- Academic Use (see Syracuse Data Lab terms) (LicenseRef-Research-Only)
- Records
- 1,193,699
- Nodes
- 1,193,699
- Edges
- 4,519,340
- Nodes are
- user
- Edges are
- friendship (undirected)
- Attributes
- nodes have no attributes; edges have no attributes
- Languages
- en
- Collected
- December 2010 (2010s)
- Tasks
- From the graph: link prediction, community detection
- Region
- United Kingdom · Europe (inferred: named in the description)
Provenance
- Originally published at
- https://datasets.syr.edu link checked
- Original files as received
- The source files, unconverted, kept for reference: mirrored on echo.directory on 2026-10-20, 18.6 MB across 1 files. Checksums in MANIFEST.json. For use, start with the data package below.
- Data package
- Version 1.0.0 of this dataset as an ECHO Data Package: edges (5,115,300 rows), nodes (108,493 rows).
- Structure
- Directed network
How to cite
BibTeX
@misc{echo2026,
title = {ECHO: Exploratory Compendium of Humanity Online},
author = {Switzer, Braden and Zafarani, Reza},
year = {2026},
url = {https://echo.directory},
note = {Syracuse University}
}
@misc{lastfmsyr,
title = {{Last.fm Friendship Network Dataset}},
author = {Kearl, Megan and Zafarani, Reza and Liu, Huan},
year = {2010},
publisher = {Social Computing Data Repository, Data Lab, Syracuse University},
url = {https://datasets.syr.edu}
} APA
Switzer, B., & Zafarani, R. (2026). ECHO: Exploratory Compendium of Humanity Online [Data repository]. Syracuse University. https://echo.directory
Kearl, M., Zafarani, R., & Liu, H. (2010). Last.fm Friendship Network (December 2010, Syracuse Data Lab) [Data set]. https://lastfm-friendship-2010.echo.directory/
MLA
Switzer, Braden, and Reza Zafarani. ECHO: Exploratory Compendium of Humanity Online. Syracuse University, 2026, echo.directory.
Kearl, Megan, et al. Last.fm Friendship Network (December 2010, Syracuse Data Lab). 2010, lastfm-friendship-2010.echo.directory/.