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si.edu has 4 DNS entries . The authorative whois server for the top level domain 'edu' is whois.educause.edu
Official website of the Smithsonian, the world's largest museum and research complex, with 19 museums, 9 research centers, and affiliates around the world.
Content preview from si.edu: The Smithsonian Institution is the world's largest museum, education, and research complex. We are a community of learning and an opener of doors. Join us on a voyage of discovery. Explore our vast digital resources and learn online.
DNS Records 
NSsi-names2.si.edu
NSsi-names1.si.edu
- RRSIG NS 8 2 86400 20220825102046 20220815101546 58180 si.edu. iYJld45pe/XBn6qVaEJNWHcOr7Tr8d9J qRcMGIbm8ohkZ0jSHu6uEK6lsaDXrCUf 7rPY6EH03PzTkywb9dO954cc5lPSntKl vaY8XpO+mGAytS4BRKYJm/Zen//rTFn+ xRjlRrciu84eT3A8Dkjobj0Y4AnvyZLS npFOulMjlhA=
- RRSIG NS 8 2 86400 20220825102046 20220815101546 9249 si.edu. qMkaszsXNFJsavUiRjs2MpLTl/M/frgA 5ZdZ85GchY8okYwAf7/BvnIhLV/NnD2O /hUe1ebz/0gR9dIhd8Xe56W81wTBeST0 i7LJYN6Wkz6u9T7TBkz8nXC/iOfAkOdv sbB4tCpks6lvn2fk8H+kMP5sBZayHNLm /R7+kMRYYjI=
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Whois for si.edu
From server whois.educause.edu 1 week, 1 day ago (None):
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Strict-transport-security: max-age=31536000; includeSubDomains; preload X-drupal-cache: HIT Permissions-policy: interest-cohort=() Content-language: en Content-encoding: gzip Transfer-encoding: chunked Set-cookie: TS0115de7f=01a3504f4cb1a54498722a0aadbee1424b6b8e98919ddac3e7433a336910c3bfd76479841a615f64e58482b804515835ad308482fc; Path=/; Domain=.www.si.edu; Secure; HTTPOnly Expires: Sun, 19 Nov 1978 05:00:00 GMT Vary: Cookie,Accept-Encoding Last-modified: Fri, 12 Aug 2022 14:34:28 GMT Connection: Upgrade, close Upgrade: h2,h2c Link: <https://www.si.edu/sites/default/files/nasm2014-02088_v4.jpg>; rel="image_src",<https://www.si.edu/home>; rel="canonical" Etag: "1660314868-0" Cache-control: public, max-age=3600 Date: Fri, 12 Aug 2022 14:40:01 GMT X-frame-options: SAMEORIGIN X-content-type-options: nosniff Content-type: text/html; charset=utf-8 Content-security-policy: upgrade-insecure-requests;