MXLIST.NET - 4c5.math.upenn.edu
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4c5.math.upenn.edu checked at 2025-10-19T18:39:34.162Z 61ms 22/22/22 100% R:104c5.math.upenn.edu
| A | 128.91.40.120🇺🇸 UPENN | ||||||
| PTR | 4c5.math.upenn.edu | ||||||
math.upenn.edu
| MX | mxa-00390e01.gslb.pphosted.com | ||||||
| MX | mxb-00390e01.gslb.pphosted.com | ||||||
| A | 52.42.92.117🇺🇸 Amazon | ||||||
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4c5.math.upenn.edu points to a single IP number: 128.91.40.120.
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