panjiva.com - bgp.he.net

SOA

Primary NS

Mailbox

hostmaster.mcgraw-hill.com

Serial

2023011943

Refresh

14400

Retry

7200

Expire

2592000

Minimum TTL

300

MX

TXT

_b870kbyrecfq2jr9igj0ez8vtj7i600

v=spf1 ip4:34.203.163.74/32 ip4:52.6.68.21/32 ip4:18.232.200.61/32 ip4:34.203.100.158/32 ip4:34.203.52.115/32 include:sendgrid.net ~all

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