Why subnet mask for IP 10.0.1.4 is 255.255.255.0?

Posted by Rohit Kandhal on Super User See other posts from Super User or by Rohit Kandhal
Published on 2012-06-08T13:35:21Z Indexed on 2012/06/09 4:42 UTC
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networking

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apple

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subnet

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airport-extreme

Well I'm not sure whether I'm missing something here. But all I've read is that if first octet of IP is within 0 - 127 then it is categorized as Class A subnet and correspondingly Subnet Mask for this is 255.0.0.0 but when I connect my system to Apple airport then my system gets IP as 10.0.1.4 however subnet mask is 255.255.255.0 not 255.0.0.0. Please explain what I'm missing here.

Adapter Information

If there is something like for apple router subnet mask is calculated on some different flags then please let me know.

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