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216.73.216.226
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spf-proofpoint.isc.upenn.edu
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spf-proofpoint.isc.upenn.edu
IP addresses from 2026-05-27 to 2026-06-05
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2026-05-27
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spf-proofpoint.isc.upenn.edu has no A records.
AAAA
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spf-proofpoint.isc.upenn.edu has no AAAA records.