# ADS mirrors

## Is ADS down?

If you suspect that ADS might be down you can check the following resources:

- [Is ADS down for everyone or just me?](https://downforeveryoneorjustme.com/ui.adsabs.harvard.edu?proto=https)
- [SAO/NASA ADS on Twitter](https://twitter.com/adsabs)
- [Search recent tweets for '@adsabs down'](https://twitter.com/search?q=%40adsabs%20down&src=typed_query&f=live)

## List of ADS mirrors

The ADS bibliographic services are available from several mirror sites. A current list of these services is available [here](https://adsabs.harvard.edu/mirrors.html). This list (as of 2022 January 20) is duplicated below, in case you need it at a time when the [adsabs.harvard.edu](https://adsabs.harvard.edu) site is down.

- [Harvard-Smithsonian Center for Astrophysics, Cambridge, USA](https://adsabs.harvard.edu)
- [Centre de Données astronomiques de Strasbourg, France](https://cdsads.u-strasbg.fr)
- [University of Nottingham, United Kingdom](https://ukads.nottingham.ac.uk)
- [European Southern Observatory, Garching, Germany](https://esoads.eso.org)
- [Astronomisches Rechen-Institut, Heidelberg, Germany](https://ads.ari.uni-heidelberg.de)
- [Institute of Astronomy of the Russian Academy of Sciences, Moscow, Russia](https://ads.inasan.ru)
- [Main Astronomical Observatory, Kiev, Ukraine](https://ads.mao.kiev.ua)
- [Pontificia Universidad Católica, Santiago, Chile](https://ads.astro.puc.cl)
- [National Astronomical Observatory, Tokyo, Japan](https://ads.nao.ac.jp)
- [National Astronomical Observatory, Chinese Academy of Science, Beijing, China](https://ads.bao.ac.cn)
- [Inter-University Centre for Astronomy and Astrophysics, Pune, India](https://ads.iucaa.ernet.in)
- [Indonesian Institute of Sciences, Jakarta, Indonesia](https://ads.arsip.lipi.go.id)
- [Inter-University Institute for Data Intensive Astronomy, South Africa](https://ads.idia.ac.za/)
- [Observatório Nacional, Rio de Janeiro, Brazil](https://ads.on.br)