ORDER AND JUDGMENT *
Larry Clinton Harper appeals the district court’s denial of his pro se motion for resentencing under 18 U.S.C. § 3582(c)(2). The district court denied his motion on the merits, finding that Mr. Harper was not sentenced based on a Sentencing Guidelines range which had subsequently been lowered and that he was therefore ineligible for a sentence reduction under Section *7283582(c)(2). On appeal, Mr. Harper’s trial counsel filed an Anders brief and moved to withdraw as counsel. Mr. Harper filed a pro se response, and the government declined to file a brief. While agreeing with the district court’s analysis, we find that its conclusion rendered it without jurisdiction to consider the merits of Mr. Harper’s case. We therefore remand with instructions to dismiss the case and we deem moot counsel’s motion to withdraw.
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In October 2006, Mr. Harper was indicted in federal court in the Northern District of Oklahoma on two methamphetamine-related counts. Count One charged him with conspiracy under 21 U.S.C. § 846, alleging that Mr. Harper conspired to possess 500 grams or more of a mixture containing a detectable amount of methamphetamine, in violation of 21 U.S.C. § 841(a)(1) and (b)(1)(A). Count Two alleged that Mr. Harper possessed with the intent to distribute 50 grams or more of a mixture containing a detectable amount of methamphetamine, in violation of 21 U.S.C. § 841(a)(1) and (b)(1)(B). Mr. Harper pled guilty to both counts. He was fined $5,000 and sentenced to terms of 120 months on each count, to be served concurrently, followed by five years of supervised release.1 Mr. Harper did not directly appeal or collaterally attack his conviction or sentence.
Mr. Harper did, however, nearly a year later, file a pro se motion for modification of his sentence pursuant to 18 U.S.C. § 3582(c)(2). The statute allows that, “in the case of a defendant who has been sentenced to a term of imprisonment based on a sentencing range that has subsequently been lowered by the Sentencing Commission ... the court may reduce the term of imprisonment, after considering the factors set forth in section 3553(a)....” Id. In November 2007, the Sentencing Commission’s Amendment 706 to the Sentencing Guidelines took effect; that amendment, enacted to revise the manner in which sentencing levels in crack cocaine convictions are determined, effectively reduced by two the base Guidelines levels for defendants sentenced for crack cocaine offenses after November 1, 2007. Mr. Harper argued that he “qualifie[d] for the Amendments listed in [U.S.S.G. § 1B1.10]” and should be resentenced by the district court.2
The district court disagreed. The court determined that Mr. Harper was charged with, indicted for, pled guilty to, and sentenced for, methamphetamine-related offenses. Crack cocaine played no role in the calculation of his recommended sentence under the Guidelines. On this basis, the district court denied Mr. Harper’s motion, holding that Amendment 706’s reduction in base Guidelines levels was inapplicable to his case and Mr. Harper was ineligible for resentencing under 18 U.S.C. § 3582(c) and U.S.S.G. § 1B1.10. See D. Ct. Order (March 19, 2008).
*729Mr. Harper filed a pro se notice of appeal. This court notified Mr. Harper’s trial counsel and ordered him to file an entry of appearance and an opening brief. Counsel entered an appearance and filed a brief in accordance with Anders v. California, 386 U.S. 738, 87 S.Ct. 1396, 18 L.Ed.2d 493 (1967), requesting leave to withdraw from the case. Counsel asserted that “[a]fter a conscientious examination of the record below, the issues presented in this appeal have been thoroughly researched and it is counsel’s belief that there is no merit to these issues.” Br. at 7. Mr. Harper docketed a response to counsel’s Anders brief with this court, though he does not revisit the merits of his Section 3582 motion. Instead, he raises a number of new arguments not presented to the district court and asks to be resentenced to time served and to be released.3
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After a thorough review of the record in this case, we agree with the district court that Mr. Harper’s sentence was not “based on a sentencing range that has subsequently been lowered by the Sentencing Commission.” 18 U.S.C. § 3582(c)(2). Under our case law, however, such a determination rendered the district court without jurisdiction to consider the motion, and the case should have been dismissed for lack of jurisdiction. See United States v. Trujeque, 100 F.3d 869, 871 (10th Cir.1996) (“These facts establish that [defendant’s] sentence was not ‘based on a sentencing range that has subsequently been lowered by the Sentencing Commission,’ .... Thus, the district court should have dismissed [defendant’s] motion without considering its merits.”); see also United States v. Curtis, 252 Fed.Appx. 886, 887 (10th Cir.2007) (“[The Amendment] did not subsequently lower [defendant’s] sentencing range, and consequently the district court had, no jurisdiction to consider a modification to his sentence under 18 U.S.C. § 3582(c)(2).” (emphasis added)). As the district court was without jurisdiction to consider the merits of Mr. Harper’s motion under 18 U.S.C. § 3582, we will not consider the merits of the other arguments Mr. Harper presents in his response to counsel’s motion to withdraw. See Schmidt v. King, 913 F.2d 837, 839 (10th Cir.1990) (“Although [the parties] raise several arguments on appeal relating to the merits of this action, we do not address those arguments because we conclude the district court lacked jurisdiction to consider this action.”); see also 15A Wright, Miller & Cooper, Federal Practice and Procedure § 3903 (“The rule is well established that if a district court lacked subject matter jurisdiction, the court of appeals is obliged to notice the lack ..., and lacks jurisdiction to consider the merits of the case.”).
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For the foregoing reasons, we remand with instructions to dismiss for lack of jurisdiction Mr. Harper’s motion for resentencing under 18 U.S.C. § 3582(c)(2) and deem moot counsel’s motion to withdraw.