Did you see all those supported bands? Whoa! Verizon support too.
Here are the bands for the Americas SKU:
GSM: 850/900/1800/1900 MHz
CDMA: Band Class: 0/1/10
WCDMA: Bands: 1/2/4/5/8
LTE: Bands: 2/3/4/5/7/12/13/17/25/26/29/41
CA DL: Bands: B2-B13, B2-B17, B2-29, B4-B5, B4-B13, B4-B17, B4-B29
And for the international version:
GSM: 850/900/1800/1900 MHz
CDMA: not supported
WCDMA: Bands: 1/2/4/5/6/8/9/19
LTE: Bands: 1/3/5/7/8/9/19/20/28/41
CA DL: B3-B5, B3-B8
Source:
http://www.androidpolice.com/2014/10/15/the-nexus-6-will-come-in-two-versions-for-the-americas-and-rest-of-the-worldhere-are-all-the-supported-bands/
https://sites.google.com/a/pressatgoogle.com/android-10-15/nexus6