<?xml version='1.0'?><?xml-stylesheet type='text/xsl' href='https://whois.arin.net/xsl/website.xsl' ?><ns4:pft xmlns="http://www.arin.net/whoisrws/core/v1" xmlns:ns2="http://www.arin.net/whoisrws/rdns/v1" xmlns:ns3="http://www.arin.net/whoisrws/netref/v2" xmlns:ns4="http://www.arin.net/whoisrws/pft/v1"><net copyrightNotice="Copyright 1997-2026, American Registry for Internet Numbers, Ltd." inaccuracyReportUrl="https://www.arin.net/resources/registry/whois/inaccuracy_reporting/" termsOfUse="https://www.arin.net/resources/registry/whois/tou/"><registrationDate>2011-02-28T18:39:00-05:00</registrationDate><rdapRef>https://rdap.arin.net/registry/ip/173.252.64.0</rdapRef><ref>https://whois.arin.net/rest/net/NET-173-252-64-0-1</ref><ns2:delegations copyrightNotice="Copyright 1997-2026, American Registry for Internet Numbers, Ltd." inaccuracyReportUrl="https://www.arin.net/resources/registry/whois/inaccuracy_reporting/" termsOfUse="https://www.arin.net/resources/registry/whois/tou/"><ns2:delegationRef name="92.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/92.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="107.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/107.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="66.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/66.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="97.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/97.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="108.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/108.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="98.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/98.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="111.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/111.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="118.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/118.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="94.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/94.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="102.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/102.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="74.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/74.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="103.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/103.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="116.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/116.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="88.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/88.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="120.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/120.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="113.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/113.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="87.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/87.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="78.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/78.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="68.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/68.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="69.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/69.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="96.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/96.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="77.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/77.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="82.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/82.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="71.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/71.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="110.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/110.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="126.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/126.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="122.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/122.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="64.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/64.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="75.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/75.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="117.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/117.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="100.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/100.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="93.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/93.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="125.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/125.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="121.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/121.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="90.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/90.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="123.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/123.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="119.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/119.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="70.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/70.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="86.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/86.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="73.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/73.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="81.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/81.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="109.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/109.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="79.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/79.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="89.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/89.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="67.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/67.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="101.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/101.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="124.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/124.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="65.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/65.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="105.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/105.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="114.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/114.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="76.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/76.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="99.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/99.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="91.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/91.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="83.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/83.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="80.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/80.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="85.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/85.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="106.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/106.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="104.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/104.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="127.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/127.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="72.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/72.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="84.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/84.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="112.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/112.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="115.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/115.252.173.in-addr.arpa.</ns2:delegationRef><ns2:delegationRef name="95.252.173.in-addr.arpa.">https://whois.arin.net/rest/rdns/95.252.173.in-addr.arpa.</ns2:delegationRef></ns2:delegations><endAddress>173.252.127.255</endAddress><handle>NET-173-252-64-0-1</handle><name>FACEBOOK-INC</name><netBlocks><netBlock><cidrLength>18</cidrLength><endAddress>173.252.127.255</endAddress><description>Direct Allocation</description><type>DA</type><startAddress>173.252.64.0</startAddress></netBlock></netBlocks><pocs copyrightNotice="Copyright 1997-2026, American Registry for Internet Numbers, Ltd." inaccuracyReportUrl="https://www.arin.net/resources/registry/whois/inaccuracy_reporting/" termsOfUse="https://www.arin.net/resources/registry/whois/tou/"/><resources copyrightNotice="Copyright 1997-2026, American Registry for Internet Numbers, Ltd." inaccuracyReportUrl="https://www.arin.net/resources/registry/whois/inaccuracy_reporting/" termsOfUse="https://www.arin.net/resources/registry/whois/tou/"><limitExceeded limit="256">false</limitExceeded></resources><orgRef handle="THEFA-3" name="Facebook, Inc.">https://whois.arin.net/rest/org/THEFA-3</orgRef><parentNetRef handle="NET-173-0-0-0-0" name="NET173">https://whois.arin.net/rest/net/NET-173-0-0-0-0</parentNetRef><startAddress>173.252.64.0</startAddress><updateDate>2021-12-14T20:28:46-05:00</updateDate><version>4</version></net><org copyrightNotice="Copyright 1997-2026, American Registry for Internet Numbers, Ltd." inaccuracyReportUrl="https://www.arin.net/resources/registry/whois/inaccuracy_reporting/" termsOfUse="https://www.arin.net/resources/registry/whois/tou/"><registrationDate>2004-08-11T14:02:21-04:00</registrationDate><rdapRef>https://rdap.arin.net/registry/entity/THEFA-3</rdapRef><ref>https://whois.arin.net/rest/org/THEFA-3</ref><canAllocate>Y</canAllocate><city>Menlo Park</city><iso3166-1><code2>US</code2><code3>USA</code3><name>United States</name><e164>1</e164></iso3166-1><handle>THEFA-3</handle><name>Facebook, Inc.</name><pocs copyrightNotice="Copyright 1997-2026, American Registry for Internet Numbers, Ltd." inaccuracyReportUrl="https://www.arin.net/resources/registry/whois/inaccuracy_reporting/" termsOfUse="https://www.arin.net/resources/registry/whois/tou/"><pocLinkRef description="Tech" function="T" handle="OPERA82-ARIN">https://whois.arin.net/rest/poc/OPERA82-ARIN</pocLinkRef><pocLinkRef description="Admin" function="AD" handle="OPERA82-ARIN">https://whois.arin.net/rest/poc/OPERA82-ARIN</pocLinkRef><pocLinkRef description="Abuse" function="AB" handle="OPERA82-ARIN">https://whois.arin.net/rest/poc/OPERA82-ARIN</pocLinkRef></pocs><postalCode>94025</postalCode><iso3166-2>CA</iso3166-2><streetAddress><line number="0">1601 Willow Rd.</line></streetAddress><updateDate>2024-02-14T09:58:24-05:00</updateDate><resources copyrightNotice="Copyright 1997-2026, American Registry for Internet Numbers, Ltd." inaccuracyReportUrl="https://www.arin.net/resources/registry/whois/inaccuracy_reporting/" termsOfUse="https://www.arin.net/resources/registry/whois/tou/"><limitExceeded limit="256">false</limitExceeded></resources></org><poc relatedDescription="Tech" relatedFunction="T" copyrightNotice="Copyright 1997-2026, American Registry for Internet Numbers, Ltd." inaccuracyReportUrl="https://www.arin.net/resources/registry/whois/inaccuracy_reporting/" termsOfUse="https://www.arin.net/resources/registry/whois/tou/"><registrationDate>2005-07-18T20:00:06-04:00</registrationDate><rdapRef>https://rdap.arin.net/registry/entity/OPERA82-ARIN</rdapRef><ref>https://whois.arin.net/rest/poc/OPERA82-ARIN</ref><city>Menlo Park</city><companyName>Facebook</companyName><iso3166-1><code2>US</code2><code3>USA</code3><name>United States</name><e164>1</e164></iso3166-1><handle>OPERA82-ARIN</handle><isRoleAccount>Y</isRoleAccount><lastName>Operations</lastName><emails><email>noc@fb.com</email><email>domain@facebook.com</email></emails><resources copyrightNotice="Copyright 1997-2026, American Registry for Internet Numbers, Ltd." inaccuracyReportUrl="https://www.arin.net/resources/registry/whois/inaccuracy_reporting/" termsOfUse="https://www.arin.net/resources/registry/whois/tou/"><limitExceeded limit="256">false</limitExceeded></resources><phones><phone><number>+1-650-543-4800</number><type><description>Office</description><code>O</code></type></phone></phones><pocType><description>General use</description><type>G</type></pocType><postalCode>94025</postalCode><iso3166-2>CA</iso3166-2><status><description>Valid</description><code>PV</code></status><streetAddress><line number="0">1601 Willow Rd.</line></streetAddress><updateDate>2025-10-30T14:33:05-04:00</updateDate></poc></ns4:pft>