Federal inmate Stephen Norwood appeals the district court’s 1 denial of his 28 U.S.C. § 2241 petition in which he sought prior-custody credit towards service of his federal sentence. Upon careful de novo review, see Abdullah v. Hedrick, 392 F.3d 957, 959 (8th Cir. 2004), we conclude that Norwood was not entitled to relief. It is undisputed that the entire time period at *580 issue was credited against a state sentence that he was serving (notwithstanding his contention that the state lost, “primary” custody over him at some point). Thus, the time was not eligible for credit against his federal sentence. See 18 U.S.C. § 3585(b); Elwell v. Fisher, 716 F.3d 477, 481 (8th Cir. 2013).

Accordingly, we affirm. See 8th Cir. R. 47B.