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| 216.131.57.0/24 | CIDR | Yes | | |
| 216.82.180.136 | URL | Yes | | |
| 216.82.186.0/24 | CIDR | Yes | | |
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| api.53.com | URL | Yes | | |
| api.newline53.com | URL | Yes | | |
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| express.53.com | URL | Yes | | |
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| http://stg.usdirectexpress.com | URL | Yes | | |
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| http://wealthconnect.comerica.com | URL | Yes | | |
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| https://express.53.com/portal | URL | Yes | | |
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| https://myapps.53.com/app/fifththird_degreedcontractor_1/exk5q7jnnuzgrrdct4h7/sso/saml | URL | Yes | | |
| https://myapps.53.com/app/fifththird_degreedemployee_1/exk5q7e9br9cbm0sj4h7/sso/saml | URL | Yes | | |
| https://onlinebanking.53.com/ | URL | Yes | | |
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| https://paypoint.us.comerica.net/bankvisibility/viewbankdashboard.do?param_methodkey:submit.view=link | URL | Yes | | |
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| https://sys.express.53.com | URL | Yes | | |
| https://wsde260n-1.info53.com:481/olb/#/login | URL | Yes | | |
| ifsservices.com | URL | Yes | | |
| lendeavor.com | URL | Yes | | |
| locations.53.com | URL | Yes | | |
| manageprovide.com | URL | Yes | | |
| newline53.com | URL | Yes | | |
| onlinebanking.53.com | URL | Yes | | |
| r53comerica.net | URL | Yes | | |
| sandbox.newline53.com | URL | Yes | | |
| testprovide.com | URL | Yes | | |
| usdirectexpress.com | URL | Yes | | |
| www.53.com | URL | Yes | | |
| zta.nube.53.com | URL | Yes | | |
| ztc.nube.53.com | URL | Yes | | |