str.com - dns.ninja
str.com
| DNSSEC | β οΈ Not signed | ||||||
| A | 2600:1408:5400:e8b::23f2πΊπΈ AKAMAI-ASN12600:1408:5400::/48 Akamai Technologies | ||||||
| PTR | g2600-1408-5400-0e8b-0000-0000-0000-23f2.deploy.static.akamaitechnologies.com | ||||||
| A | 2600:1408:5400:e92::23f2πΊπΈ AKAMAI-ASN12600:1408:5400::/48 Akamai Technologies | ||||||
| A | 96.7.18.138πΊπΈ Akamai96.7.16.0/20 Technologies | ||||||
| NS | ns1.costar.com β | ||||||
| A | 65.222.181.8πΊπΈ COSTAR-Reston65.222.180.0/23 Reston Subnet | ||||||
| PTR | ns1.bizquest.com | ||||||
| PTR | ns1.costar.com | ||||||
| PTR | ns1.bizbuysell.net | ||||||
| NS | a1-73.akam.net | ||||||
| A | 2600:1401:2::49πΊπΈ Akamai2600:1401:2::/48 Technologies | ||||||
| PTR | a1-73.akam.net | ||||||
| PTR | ns1-73.akam.net | ||||||
| A | 193.108.91.73π³π± Akamai193.108.91.0/24 Technologies | ||||||
| PTR | a1-73.akam.net | ||||||
| PTR | ns1-73.akam.net | ||||||
| NS | a22-64.akam.net | ||||||
| A | 2600:1480:7800::40πΊπΈ Akamai2600:1480:7800::/48 Technologies | ||||||
| PTR | a22-64.akam.net | ||||||
| A | 23.211.61.64πΊπΈ Akamai23.211.61.0/24 Technologies | ||||||
| PTR | a22-64.akam.net | ||||||
| PTR | asia3.akam.net | ||||||
| NS | a3-65.akam.net | ||||||
| A | 2600:1408:1c::41πΊπΈ Akamai2600:1408:1c::/48 Technologies | ||||||
| PTR | a3-65.akam.net | ||||||
| PTR | ns7-65.akam.net | ||||||
| A | 96.7.49.65πΊπΈ Akamai96.7.49.0/24 Technologies | ||||||
| PTR | a3-65.akam.net | ||||||
| PTR | ns7-65.akam.net | ||||||
| PTR | use3.akam.net | ||||||
| NS | a4-66.akam.net | ||||||
| A | 2600:1480:9000::42πΊπΈ Akamai2600:1480:9000::/48 Technologies | ||||||
| PTR | a4-66.akam.net | ||||||
| A | 72.246.46.66πΊπΈ Akamai72.246.46.0/24 Technologies | ||||||
| PTR | a4-66.akam.net | ||||||
| NS | a6-67.akam.net | ||||||
| A | 2600:1401:1::43πΊπΈ Akamai2600:1401:1::/48 Technologies | ||||||
| PTR | a6-67.akam.net | ||||||
| A | 23.211.133.67πΊπΈ Akamai23.211.133.0/24 Technologies | ||||||
| PTR | a6-67.akam.net | ||||||
| NS | a9-64.akam.net | ||||||
| A | 2a02:26f0:117::40π³π± Akamai2a02:26f0:117::/48 Technologies | ||||||
| PTR | a9-64.akam.net | ||||||
| PTR | ns5-64.akam.net | ||||||
| A | 184.85.248.64πΊπΈ Akamai184.85.248.0/24 Technologies | ||||||
| PTR | a9-64.akam.net | ||||||
| PTR | asia4.akam.net | ||||||
| PTR | ns5-64.akam.net | ||||||
| MX | costar-com.mail.protection.outlook.com β | ||||||
| A | 2a01:111:f403:c922::πΊπΈ Microsoft2a01:111:f000::/36 | ||||||
| PTR | mail-bl0pr03cu00200.inbound.protection.outlook.com | ||||||
| A | 2a01:111:f403:f903::πΊπΈ Microsoft2a01:111:f000::/36 | ||||||
| A | 2a01:111:f403:f905::3πΊπΈ Microsoft2a01:111:f000::/36 | ||||||
| PTR | mail-dm5pr02cu00203.inbound.protection.outlook.com | ||||||
| A | 2a01:111:f403:f90a::πΊπΈ Microsoft2a01:111:f000::/36 | ||||||
| PTR | mail-bn6pr02cu00300.inbound.protection.outlook.com | ||||||
| A | 52.101.10.10πΊπΈ Microsoft52.96.0.0/12 MICROSOFT | ||||||
| PTR | mail-bn8pr05cu00102.inbound.protection.outlook.com | ||||||
| A | 52.101.41.0πΊπΈ Microsoft52.96.0.0/12 MICROSOFT | ||||||
| PTR | mail-byapr05cu00400.inbound.protection.outlook.com | ||||||
| A | 52.101.41.24πΊπΈ Microsoft52.96.0.0/12 MICROSOFT | ||||||
| PTR | mail-sj0pr03cu01600.inbound.protection.outlook.com | ||||||
| A | 52.101.194.15πΊπΈ Microsoft52.96.0.0/12 MICROSOFT | ||||||
| PTR | mail-ch4pr21cu00107.inbound.protection.outlook.com | ||||||
| TXT | google-site-verification=LV0OV7RPPA-jyGljhZo2BOBHZNczpx7Dt1B-F2Wpc5U | ||||||
| TXT | docker-verification=979386b7-1876-4772-99b0-1fa5cd4efedc | ||||||
| TXT | spf2.0/pra mx include:e2ma.net ~all | ||||||
| TXT | 3f9ijgpai823g4r25mu04m4k5h | ||||||
| TXT | canva-site-verification=hKgtpZRw2B7IuDPdHsILkA | ||||||
| TXT | jamf-site-verification=IHOxAkvhiM1tcEV8ofZH9w | ||||||
| TXT | MUAMGYrAKdKtMIyHpI6IWMUpfQGqhbMpruMd6MkLg3Suwri4Hcb61xuZ9gt5dcDjsrrrM8MutxNd8... | ||||||
| TXT | pendo-domain-verification=a8a941e4-be70-42ca-972a-cd9b54b83282 | ||||||
| TXT | _5wquszaakf7nyzh6sy2gtipbhu8kzzt | ||||||
| TXT | logmein-verification-code=f8589d4a-21cd-45f7-a4f3-f518f00f4a75 | ||||||
| TXT | dropbox-domain-verification=v62x8oubsws9 | ||||||
| TXT | v=spf1 ip4:65.222.180.160/27 ip4:156.70.150.183 ip4:204.239.0.0/24 ip4:198.20... | ||||||
| TXT | 16f3eccqq2kbekgb33mf5euks6 | ||||||
| TXT | knowbe4-site-verification=f260d28316f3a7f096abacd939b0359a | ||||||
| TXT | atlassian-domain-verification=LAkz2FUxxMo9oBp9qlpKyMPkFQT3p7fXn2F/dz0S07Gt8LA... | ||||||
| TXT | stripe-verification=AA754CD49EC81C43C14486AC79AC5B1FD59755E02D0EB274E27128400... | ||||||
| TXT | MS=ms87202135 | ||||||
| TXT | onetrust-domain-verification=934f8d155da844c1b7bc91d74138d723 | ||||||
| TXT | _wqoh6tev91q2qmfmzo0nbzxh0y6o3zr | ||||||
| TXT | D7jZNpT0DiatNhIU5JU+KZdpzSB6/MRjsoYQOuuJh0ppI1AxUl5QipUR2hJlNuo64vKRiKjCE1F+l... | ||||||
| TXT | _gjzr35b5wppl4534pr4z8b9dlhjqntw | ||||||
| TXT | apple-domain-verification=0qlVKUBSS35j1xT8 | ||||||
| TXT | onetrust-domain-verification=9a324ab3e8a9439f814c91ef5421979b | ||||||
| TXT | ZOOM_verify_O4eXAoTsQG2XMtfkhZFZQQ | ||||||
| TXT | pardot934883=d1ead15c33c26e83e406806a4f589aaae610b71a8656f5fbc0a02e774db9d30d | ||||||
| TXT | _omwrbfd5oa6vvr3d1njome694h26m8f | ||||||
| TXT | figma-domain-verification=8232118525ac89d71aa3f807657ba9e5e26cfa8f711f2e3144c... | ||||||
| TXT | adobe-idp-site-verification=24664704b6bf9cad007ee8e4e6f54db759418404868491369... | ||||||
| TXT | duo_sso_verification=s095uZ3Nd9HCxOAXvQQ3mk0A7UvKqyVx9oWHNIDIavhLhOgrVydmhq6x... | ||||||
| TXT | r6bhumr8l06iut3iuh3rk042tj | ||||||
| TXT | b6ci9bg6fkop7742lcp574iab3 | ||||||
| TXT | google-site-verification=P8yhHxUd06QaZOc7Vx806NJi1cu5SgLFKmSJQjF0tvA | ||||||
| SOA | ns1.costar.comhostmaster@str.com 2026-07-13 #4 | ||||||
com
| DNSSEC | π Signed (DS record present) | ||||||
| NS | a.gtld-servers.net β | ||||||
| NS | b.gtld-servers.net | ||||||
| NS | c.gtld-servers.net | ||||||
| NS | d.gtld-servers.net | ||||||
| NS | e.gtld-servers.net | ||||||
| NS | f.gtld-servers.net | ||||||
| NS | g.gtld-servers.net | ||||||
| NS | h.gtld-servers.net | ||||||
| NS | i.gtld-servers.net | ||||||
| NS | j.gtld-servers.net | ||||||
| NS | k.gtld-servers.net | ||||||
| NS | l.gtld-servers.net | ||||||
| NS | m.gtld-servers.net | ||||||
| SOA | a.gtld-servers.netnstld@verisign-grs.com serial=1784390987 | ||||||
rank #37414 in the tld
π Tranco rank: #219,351
PTR for
Subdomains
Same first word
Similar names
DNS History
39 records (11 active, 28 former)
βNSa1-73.akam.net2026-02-15 β 2026-07-18 Β· 3 obs
β 2026-02-15 09:28:08
β 2026-07-18 16:16:06
βNSa22-64.akam.net2026-02-15 β 2026-07-18 Β· 3 obs
β 2026-02-15 09:28:08
β 2026-07-18 16:16:06
βNSa3-65.akam.net2026-02-15 β 2026-07-18 Β· 3 obs
β 2026-02-15 09:28:08
β 2026-07-18 16:16:06
βNSa4-66.akam.net2026-02-15 β 2026-07-18 Β· 3 obs
β 2026-02-15 09:28:08
β 2026-07-18 16:16:06
βNSa6-67.akam.net2026-02-15 β 2026-07-18 Β· 3 obs
β 2026-02-15 09:28:08
β 2026-07-18 16:16:06
βNSa9-64.akam.net2026-02-15 β 2026-07-18 Β· 3 obs
β 2026-02-15 09:28:08
β 2026-07-18 16:16:06
βNSns1.costar.com2026-02-15 β 2026-07-18 Β· 3 obs
β 2026-02-15 09:28:08
β 2026-07-18 16:16:06
βNSns59.worldnic.com2015-09-03 β 2017-05-16 Β· 4 obs
β 2017-05-16 14:29:10
β 2026-02-15 09:28:08
β 2026-07-18 16:16:06
βNSns60.worldnic.com2015-09-03 β 2017-05-16 Β· 4 obs
β 2017-05-16 14:29:10
β 2026-02-15 09:28:08
β 2026-07-18 16:16:06
βMXcostar-com.mail.protection.outlook.com2026-02-15 β 2026-07-18 Β· 3 obs
β 2026-02-15 09:28:08
β 2026-07-18 16:16:06
βMXmail.wwstar.com2015-09-03 β 2017-05-16 Β· 4 obs
β 2017-05-16 14:29:10
β 2026-02-15 09:28:08
β 2026-07-18 16:16:06
βA173.223.153.92026-02-28 β 2026-02-28 Β· 4 obs
β 2026-02-28 20:25:46
β 2026-03-17 05:53:00
β 2026-07-18 16:16:06
βA184.27.0.1772026-03-31 β 2026-05-07 Β· 9 obs
β 2026-03-31 18:03:44
β 2026-04-03 07:54:34
β 2026-04-03 13:34:44
β 2026-04-05 00:40:40
β 2026-05-01 17:29:44
β 2026-05-07 21:57:46
β 2026-05-08 10:25:50
β 2026-07-18 16:16:06
βA23.204.223.2002026-03-23 β 2026-05-09 Β· 12 obs
β 2026-03-23 06:16:42
β 2026-03-31 18:03:44
β 2026-04-19 21:39:16
β 2026-04-21 08:53:38
β 2026-04-22 22:41:32
β 2026-04-25 23:40:00
β 2026-05-01 17:29:44
β 2026-05-08 10:25:50
β 2026-05-09 13:59:50
β 2026-05-28 21:10:32
β 2026-07-18 16:16:06
βA23.222.37.1402026-02-28 β 2026-06-22 Β· 13 obs
β 2026-02-28 11:09:24
β 2026-02-28 14:00:46
β 2026-02-28 20:25:46
β 2026-05-07 21:57:46
β 2026-05-08 10:25:50
β 2026-05-09 13:59:50
β 2026-05-28 21:10:32
β 2026-06-02 01:20:40
β 2026-06-06 01:29:12
β 2026-06-22 01:10:24
β 2026-07-01 23:02:12
β 2026-07-18 16:16:06
βA23.51.195.232026-03-17 β 2026-07-01 Β· 23 obs
β 2026-03-17 05:53:00
β 2026-03-23 06:16:42
β 2026-03-31 18:03:44
β 2026-04-03 07:54:34
β 2026-04-03 13:34:44
β 2026-04-05 00:40:40
β 2026-04-09 03:00:40
β 2026-04-11 16:56:34
β 2026-04-14 09:17:12
β 2026-04-16 23:59:04
β 2026-04-19 21:39:16
β 2026-04-25 23:40:00
β 2026-05-01 17:29:44
β 2026-05-07 21:57:46
β 2026-05-09 13:59:50
β 2026-05-28 21:10:32
β 2026-06-02 01:20:40
β 2026-06-06 01:29:12
β 2026-06-22 01:10:24
β 2026-07-01 23:02:12
β 2026-07-18 16:16:04
β 2026-07-18 16:16:06
βA2600:1406:5400:282::23f22026-05-01 β 2026-07-01 Β· 11 obs
β 2026-05-01 17:29:44
β 2026-05-07 21:57:46
β 2026-05-09 13:59:50
β 2026-05-28 21:10:32
β 2026-06-02 01:20:40
β 2026-06-06 01:29:12
β 2026-06-22 01:10:24
β 2026-07-01 23:02:12
β 2026-07-18 16:16:04
β 2026-07-18 16:16:06
βA2600:1406:5400:2a6::23f22026-05-01 β 2026-07-01 Β· 11 obs
β 2026-05-01 17:29:44
β 2026-05-07 21:57:46
β 2026-05-09 13:59:50
β 2026-05-28 21:10:32
β 2026-06-02 01:20:40
β 2026-06-06 01:29:12
β 2026-06-22 01:10:24
β 2026-07-01 23:02:12
β 2026-07-18 16:16:04
β 2026-07-18 16:16:06
βA2600:1406:5e00:780::23f22026-04-06 β 2026-04-06 Β· 4 obs
β 2026-04-06 05:19:00
β 2026-04-09 03:00:40
β 2026-07-18 16:16:06
βA2600:1406:5e00:79f::23f22026-03-17 β 2026-04-16 Β· 14 obs
β 2026-03-17 05:53:00
β 2026-03-23 06:16:42
β 2026-03-31 18:03:44
β 2026-04-03 07:54:34
β 2026-04-03 13:34:44
β 2026-04-05 00:40:40
β 2026-04-06 05:19:00
β 2026-04-09 03:00:40
β 2026-04-11 16:56:34
β 2026-04-14 09:17:12
β 2026-04-16 23:59:04
β 2026-04-19 21:39:16
β 2026-07-18 16:16:06
βA2600:1406:5e00:7a1::23f22026-03-17 β 2026-04-16 Β· 13 obs
β 2026-03-17 05:53:00
β 2026-03-23 06:16:42
β 2026-03-31 18:03:44
β 2026-04-03 07:54:34
β 2026-04-03 13:34:44
β 2026-04-05 00:40:40
β 2026-04-09 03:00:40
β 2026-04-11 16:56:34
β 2026-04-14 09:17:12
β 2026-04-16 23:59:04
β 2026-04-19 21:39:16
β 2026-07-18 16:16:06
βA2600:1408:5400:282::23f22026-03-31 β 2026-03-31 Β· 4 obs
β 2026-03-31 18:03:44
β 2026-04-03 07:54:34
β 2026-07-18 16:16:06
βA2600:1408:5400:290::23f22026-03-31 β 2026-03-31 Β· 4 obs
β 2026-03-31 18:03:44
β 2026-04-03 07:54:34
β 2026-07-18 16:16:06
βA2600:1408:5400:48a::23f22026-04-03 β 2026-05-07 Β· 9 obs
β 2026-04-03 13:34:44
β 2026-04-05 00:40:40
β 2026-04-22 22:41:32
β 2026-04-25 23:40:00
β 2026-05-01 17:29:44
β 2026-05-07 21:57:46
β 2026-05-08 10:25:50
β 2026-07-18 16:16:06
βA2600:1408:5400:4a0::23f22026-04-03 β 2026-05-07 Β· 9 obs
β 2026-04-03 13:34:44
β 2026-04-05 00:40:40
β 2026-04-22 22:41:32
β 2026-04-25 23:40:00
β 2026-05-01 17:29:44
β 2026-05-07 21:57:46
β 2026-05-08 10:25:50
β 2026-07-18 16:16:06
βA2600:1408:5400:d88::23f22026-05-09 β 2026-05-09 Β· 4 obs
β 2026-05-09 13:59:50
β 2026-05-28 21:10:32
β 2026-07-18 16:16:06
βA2600:1408:5400:da0::23f22026-05-09 β 2026-05-09 Β· 4 obs
β 2026-05-09 13:59:50
β 2026-05-28 21:10:32
β 2026-07-18 16:16:06
βA2600:1408:5400:e8b::23f22026-04-22 β 2026-07-18 Β· 5 obs
β 2026-04-22 22:41:32
β 2026-04-25 23:40:00
β 2026-07-18 16:16:04
β 2026-07-18 16:16:06
βA2600:1408:5400:e92::23f22026-04-22 β 2026-07-18 Β· 5 obs
β 2026-04-22 22:41:32
β 2026-04-25 23:40:00
β 2026-07-18 16:16:04
β 2026-07-18 16:16:06
βA2600:1408:a:181::23f22026-03-23 β 2026-03-23 Β· 4 obs
β 2026-03-23 06:16:42
β 2026-03-31 18:03:44
β 2026-07-18 16:16:06
βA2600:1408:a:188::23f22026-03-23 β 2026-03-23 Β· 4 obs
β 2026-03-23 06:16:42
β 2026-03-31 18:03:44
β 2026-07-18 16:16:06
βA2600:1408:c400:988::23f22026-02-28 β 2026-02-28 Β· 4 obs
β 2026-02-28 20:25:46
β 2026-03-17 05:53:00
β 2026-07-18 16:16:06
βA2600:1408:c400:994::23f22026-02-28 β 2026-02-28 Β· 4 obs
β 2026-02-28 20:25:46
β 2026-03-17 05:53:00
β 2026-07-18 16:16:06
βA2600:1408:ec00:280::23f22026-02-15 β 2026-04-21 Β· 11 obs
β 2026-02-15 09:28:08
β 2026-02-28 11:09:24
β 2026-04-09 03:00:40
β 2026-04-11 16:56:34
β 2026-04-14 09:17:12
β 2026-04-16 23:59:04
β 2026-04-19 21:39:16
β 2026-04-21 08:53:38
β 2026-04-22 22:41:32
β 2026-07-18 16:16:06
βA2600:1408:ec00:294::23f22026-02-15 β 2026-04-21 Β· 11 obs
β 2026-02-15 09:28:08
β 2026-02-28 11:09:24
β 2026-04-09 03:00:40
β 2026-04-11 16:56:34
β 2026-04-14 09:17:12
β 2026-04-16 23:59:04
β 2026-04-19 21:39:16
β 2026-04-21 08:53:38
β 2026-04-22 22:41:32
β 2026-07-18 16:16:06
βA2a02:26f0:1180:184::23f22026-02-28 β 2026-06-22 Β· 13 obs
β 2026-02-28 11:09:24
β 2026-02-28 14:00:46
β 2026-02-28 20:25:46
β 2026-05-07 21:57:46
β 2026-05-08 10:25:50
β 2026-05-09 13:59:50
β 2026-05-28 21:10:32
β 2026-06-02 01:20:40
β 2026-06-06 01:29:12
β 2026-06-22 01:10:24
β 2026-07-01 23:02:12
β 2026-07-18 16:16:06
βA2a02:26f0:1180:185::23f22026-02-28 β 2026-06-22 Β· 13 obs
β 2026-02-28 11:09:24
β 2026-02-28 14:00:46
β 2026-02-28 20:25:46
β 2026-05-07 21:57:46
β 2026-05-08 10:25:50
β 2026-05-09 13:59:50
β 2026-05-28 21:10:32
β 2026-06-02 01:20:40
β 2026-06-06 01:29:12
β 2026-06-22 01:10:24
β 2026-07-01 23:02:12
β 2026-07-18 16:16:06
βA50.202.211.1892015-09-03 β 2017-05-16 Β· 4 obs
β 2017-05-16 14:29:10
β 2026-02-15 09:28:08
β 2026-07-18 16:16:06
βA96.7.18.1382026-02-15 β 2026-07-18 Β· 13 obs
β 2026-02-15 09:28:08
β 2026-02-28 11:09:24
β 2026-04-09 03:00:40
β 2026-04-11 16:56:34
β 2026-04-14 09:17:12
β 2026-04-16 23:59:04
β 2026-04-19 21:39:16
β 2026-04-21 08:53:38
β 2026-04-22 22:41:32
β 2026-04-25 23:40:00
β 2026-07-18 16:16:04
β 2026-07-18 16:16:06
π DNS Trace
π Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| str.com | a4-66.akam.net, a22-64.akam.net, a3-65.akam.net, a6-67.akam.net... | - |
β Authoritative Response
Server:184.85.248.64
NS records: a4-66.akam.net, a22-64.akam.net, a3-65.akam.net, a6-67.akam.net, a1-73.akam.net, a9-64.akam.net
π DNSSEC Status
β οΈ Insecure (no DNSSEC)
No DS record for str.com (unsigned zone)
β±οΈ Timing
Total: 657ms | Queries: -
π Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 96.7.18.138 |
| AAAA | 2 | 2600:1408:5400:e8b::23f2, 2600:1408:5400:e92::23f2 |
| NS | 6 | a4-66.akam.net, a9-64.akam.net... |
| MX | 1 | costar-com.mail.protection.outlook.com ( |
| TXT | 32 | _omwrbfd5oa6vvr3d1njome694h26m8f, docker-verification=979386b7-1876-4772-9... |
| SOA | 1 | ns1.costar.com hostmaster.str.com |
Analysis
Hierarchy
str.com has five child domains: identity.str.com, www.str.com, clients.str.com, central.str.com and api.str.com.
IP Addresses
str.com directs to three IP numbers: 96.7.18.138, 2600:1408:5400:e8b::23f2 and 2600:1408:5400:e92::23f2.
a96-7-18-138.deploy.static.akamaitechnologies.com, for instance, is one of the other host names sharing IP numbers with str.com.
Name Servers
str.com delegates authority to 7 name servers: ns1.costar.com, a1-73.akam.net, a22-64.akam.net plus 4 other.
There is at least partial name server overlap between str.com and other domains β directvoklahomacityok.com, trivago.ph, oki-oxt.jp and two more among them.
These name servers regularly appear alongside a3-65.akam.net, a4-66.akam.net, a6-67.akam.net and 4 other name servers in NS record sets.
Host names that have two IP addresses:
a1-73.akam.net directs traffic to 193.108.91.73 and 2600:1401:2::49.
a22-64.akam.net directs traffic to 23.211.61.64 and 2600:1480:7800::40.
a3-65.akam.net directs traffic to 96.7.49.65 and 2600:1408:1c::41.
a4-66.akam.net directs traffic to 72.246.46.66 and 2600:1480:9000::42.
a6-67.akam.net directs traffic to 23.211.133.67 and 2600:1401:1::43.
a9-64.akam.net directs traffic to 184.85.248.64 and 2a02:26f0:117::40.
Host names that point to one IP address:
ns1.costar.com has the IP address 65.222.181.8.
Mail Servers
The sole mail server for str.com is costar-com.mail.protection.outlook.com.
Among the domains sharing a mail server setup with str.com are homesnap.com, westsiderentals.com, after55.com and two others.
str.com and other domains β costarremail.com for instance β share at least some mail servers.
With 8 IP addresses total, costar-com.mail.protection.outlook.com resolves to 52.101.10.10, 52.101.41.0, 52.101.41.24 and 5 others.