The domain mathematics.us is not free.
These domains are free:
Domain Name: MATHEMATICS.US Domain ID: D1792609-US Sponsoring Registrar: GOOGLE INC. Sponsoring Registrar IANA ID: 895 Registrar URL (registration services): www.google.com Domain Status: clientTransferProhibited Variant: MATHEMATICS.US Registrant ID: MRH4620397617 Registrant Name: Mark Hutsell Registrant Address1: 531 Lasuen Mall #18864 Registrant City: Stanford Registrant State/Province: CA Registrant Postal Code: 94309-8864 Registrant Country: United States Registrant Country Code: US Registrant Phone Number: +1.4083555244 Registrant Email: firstname.lastname@example.org Registrant Application Purpose: P3 Registrant Nexus Category: C11 Administrative Contact ID: MRH4620397617 Administrative Contact Name: Mark Hutsell Administrative Contact Address1: 531 Lasuen Mall #18864 Administrative Contact City: Stanford Administrative Contact State/Province: CA Administrative Contact Postal Code: 94309-8864 Administrative Contact Country: United States Administrative Contact Country Code: US Administrative Contact Phone Number: +1.4083555244 Administrative Contact Email: email@example.com Administrative Application Purpose: P3 Administrative Nexus Category: C11 Billing Contact ID: MRH4620397617 Billing Contact Name: Mark Hutsell Billing Contact Address1: 531 Lasuen Mall #18864 Billing Contact City: Stanford Billing Contact State/Province: CA Billing Contact Postal Code: 94309-8864 Billing Contact Country: United States Billing Contact Country Code: US Billing Contact Phone Number: +1.4083555244 Billing Contact Email: firstname.lastname@example.org Billing Application Purpose: P3 Billing Nexus Category: C11 Technical Contact ID: MRH4620397617 Technical Contact Name: Mark Hutsell Technical Contact Address1: 531 Lasuen Mall #18864 Technical Contact City: Stanford Technical Contact State/Province: CA Technical Contact Postal Code: 94309-8864 Technical Contact Country: United States Technical Contact Country Code: US Technical Contact Phone Number: +1.4083555244 Technical Contact Email: email@example.com Technical Application Purpose: P3 Technical Nexus Category: C11 Name Server: NS-CLOUD-B1.GOOGLEDOMAINS.COM Name Server: NS-CLOUD-B2.GOOGLEDOMAINS.COM Name Server: NS-CLOUD-B3.GOOGLEDOMAINS.COM Name Server: NS-CLOUD-B4.GOOGLEDOMAINS.COM Created by Registrar: GODADDY.COM, INC. Last Updated by Registrar: GOOGLE INC. Last Transferred Date: Wed Oct 21 22:09:02 GMT 2015 Domain Registration Date: Wed Apr 24 14:28:28 GMT 2002 Domain Expiration Date: Sun Apr 23 23:59:59 GMT 2017 Domain Last Updated Date: Wed Oct 21 22:10:57 GMT 2015 DNSSEC: true >>>> Whois database was last updated on: Thu Jul 07 15:17:58 GMT 2016 <<<< NeuStar, Inc., the Registry Administrator for .US, has collected this information for the WHOIS database through a .US-Accredited Registrar. This information is provided to you for informational purposes only and is designed to assist persons in determining contents of a domain name registration record in the NeuStar registry database. NeuStar makes this information available to you "as is" and does not guarantee its accuracy. By submitting a WHOIS query, you agree that you will use this data only for lawful purposes and that, under no circumstances will you use this data: (1) to allow, enable, or otherwise support the transmission of mass unsolicited, commercial advertising or solicitations via direct mail, electronic mail, or by telephone; (2) in contravention of any applicable data and privacy protection laws; or (3) to enable high volume, automated, electronic processes that apply to the registry (or its systems). Compilation, repackaging, dissemination, or other use of the WHOIS database in its entirety, or of a substantial portion thereof, is not allowed without NeuStar's prior written permission. NeuStar reserves the right to modify or change these conditions at any time without prior or subsequent notification of any kind. By executing this query, in any manner whatsoever, you agree to abide by these terms. NOTE: FAILURE TO LOCATE A RECORD IN THE WHOIS DATABASE IS NOT INDICATIVE OF THE AVAILABILITY OF A DOMAIN NAME. All domain names are subject to certain additional domain name registration rules. For details, please visit our site at www.whois.us.