Host 0.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) 1.52.180.128.in-addr.arpa domain name pointer chern.math.Lehigh.EDU. 2.52.180.128.in-addr.arpa domain name pointer galois.math.Lehigh.EDU. 3.52.180.128.in-addr.arpa domain name pointer gauss.math.Lehigh.EDU. 4.52.180.128.in-addr.arpa domain name pointer fisher.math.Lehigh.EDU. 5.52.180.128.in-addr.arpa domain name pointer lupus.math.Lehigh.EDU. 6.52.180.128.in-addr.arpa domain name pointer squid.math.Lehigh.EDU. 7.52.180.128.in-addr.arpa domain name pointer csq0.dept.Lehigh.EDU. 8.52.180.128.in-addr.arpa domain name pointer bogey.CC.Lehigh.EDU. 9.52.180.128.in-addr.arpa domain name pointer rm242-pc.dept.Lehigh.EDU. 10.52.180.128.in-addr.arpa domain name pointer chb2-gw.dept.Lehigh.EDU. 11.52.180.128.in-addr.arpa domain name pointer xs106a.CC.Lehigh.EDU. 12.52.180.128.in-addr.arpa domain name pointer rm236-pc.dept.Lehigh.EDU. 13.52.180.128.in-addr.arpa domain name pointer ml444ac.CC.lehigh.EDU. 14.52.180.128.in-addr.arpa domain name pointer mathf.dept.Lehigh.EDU. 15.52.180.128.in-addr.arpa domain name pointer jey0-dell.dept.Lehigh.EDU. 16.52.180.128.in-addr.arpa domain name pointer mathh.dept.Lehigh.EDU. 17.52.180.128.in-addr.arpa domain name pointer xmasb1.CC.Lehigh.EDU. 18.52.180.128.in-addr.arpa domain name pointer jpk2-pc.dept.Lehigh.EDU. 19.52.180.128.in-addr.arpa domain name pointer rv01-pc.dept.Lehigh.EDU. 20.52.180.128.in-addr.arpa domain name pointer wrs4-pc.dept.Lehigh.EDU. 21.52.180.128.in-addr.arpa domain name pointer ms02.dept.Lehigh.EDU. 22.52.180.128.in-addr.arpa domain name pointer pc-sak2.dept.Lehigh.EDU. 23.52.180.128.in-addr.arpa domain name pointer xs106b.CC.Lehigh.EDU. 24.52.180.128.in-addr.arpa domain name pointer pc-vd00.dept.Lehigh.EDU. 25.52.180.128.in-addr.arpa domain name pointer ss08-pc.dept.Lehigh.EDU. 26.52.180.128.in-addr.arpa domain name pointer xs106c.CC.Lehigh.EDU. 27.52.180.128.in-addr.arpa domain name pointer pc-jpk2.dept.Lehigh.EDU. 28.52.180.128.in-addr.arpa domain name pointer xmas-rm106-hp5.cc.Lehigh.EDU. 29.52.180.128.in-addr.arpa domain name pointer Roamer052029.dept.Lehigh.EDU. 30.52.180.128.in-addr.arpa domain name pointer Roamer052030.dept.Lehigh.EDU. 31.52.180.128.in-addr.arpa domain name pointer Roamer052031.dept.Lehigh.EDU. 32.52.180.128.in-addr.arpa domain name pointer xs201.dept.Lehigh.EDU. 33.52.180.128.in-addr.arpa domain name pointer pc-vd00a.dept.Lehigh.EDU. 34.52.180.128.in-addr.arpa domain name pointer bkg0-pc2.dept.Lehigh.EDU. 35.52.180.128.in-addr.arpa domain name pointer cgm0-pc.dept.Lehigh.EDU. 36.52.180.128.in-addr.arpa domain name pointer jma5-pc.dept.Lehigh.EDU. 37.52.180.128.in-addr.arpa domain name pointer csq0-pc.dept.Lehigh.EDU. 38.52.180.128.in-addr.arpa domain name pointer bkg0-pc.dept.Lehigh.EDU. 39.52.180.128.in-addr.arpa domain name pointer be01-pc.dept.Lehigh.EDU. 40.52.180.128.in-addr.arpa domain name pointer Xmas-Rm104-Hp4100.dept.Lehigh.EDU. 41.52.180.128.in-addr.arpa domain name pointer hdf3-pc.dept.Lehigh.EDU. 42.52.180.128.in-addr.arpa domain name pointer cgm0-dell.dept.Lehigh.EDU. 43.52.180.128.in-addr.arpa domain name pointer pto0-pc.dept.Lehigh.EDU. 44.52.180.128.in-addr.arpa domain name pointer fisher2.math.Lehigh.EDU. 45.52.180.128.in-addr.arpa domain name pointer ljs4-pc.dept.Lehigh.EDU. 46.52.180.128.in-addr.arpa domain name pointer eps0-pc.dept.Lehigh.EDU. 47.52.180.128.in-addr.arpa domain name pointer pc-lewisa.dept.Lehigh.EDU. 48.52.180.128.in-addr.arpa domain name pointer bad0-gw.dept.Lehigh.EDU. 49.52.180.128.in-addr.arpa domain name pointer aks2-pc.dept.Lehigh.EDU. 50.52.180.128.in-addr.arpa domain name pointer xmas-rm109b-hp4050.dept.Lehigh.EDU. 51.52.180.128.in-addr.arpa domain name pointer pc-lfn0.dept.Lehigh.EDU. 52.52.180.128.in-addr.arpa domain name pointer chb-pc.dept.Lehigh.EDU. 53.52.180.128.in-addr.arpa domain name pointer stevew.dept.Lehigh.EDU. 54.52.180.128.in-addr.arpa domain name pointer xmasb1-amx-netlinx.CC.Lehigh.EDU. 55.52.180.128.in-addr.arpa domain name pointer xmassauc-rm104-hp4050.dept.Lehigh.EDU. Host 56.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 57.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) 58.52.180.128.in-addr.arpa domain name pointer gi02-pc2.dept.Lehigh.EDU. 59.52.180.128.in-addr.arpa domain name pointer pc-carlib.dept.Lehigh.EDU. 60.52.180.128.in-addr.arpa domain name pointer sakn.dept.Lehigh.EDU. Host 61.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 62.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) 63.52.180.128.in-addr.arpa domain name pointer tjn2-pc2.dept.Lehigh.EDU. 64.52.180.128.in-addr.arpa domain name pointer xmas-rm109d-hp4050.dept.Lehigh.EDU. Host 65.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) 66.52.180.128.in-addr.arpa domain name pointer math0.dept.Lehigh.EDU. 67.52.180.128.in-addr.arpa domain name pointer mjf7-pc.dept.Lehigh.EDU. 68.52.180.128.in-addr.arpa domain name pointer mit7-pc.dept.Lehigh.EDU. 69.52.180.128.in-addr.arpa domain name pointer pc-200.dept.Lehigh.EDU. 70.52.180.128.in-addr.arpa domain name pointer mad8.dept.Lehigh.EDU. 71.52.180.128.in-addr.arpa domain name pointer brady.dept.Lehigh.EDU. 72.52.180.128.in-addr.arpa domain name pointer rm307-pc.dept.Lehigh.EDU. 73.52.180.128.in-addr.arpa domain name pointer xs106linuxpc.dept.Lehigh.EDU. Host 74.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 75.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) 76.52.180.128.in-addr.arpa domain name pointer md08-pc.dept.Lehigh.EDU. Host 77.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 78.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 79.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) 80.52.180.128.in-addr.arpa domain name pointer xmas-sauc-rm130-hp4000.dept.Lehigh.EDU. 81.52.180.128.in-addr.arpa domain name pointer mario.CC.Lehigh.EDU. 82.52.180.128.in-addr.arpa domain name pointer pc-tjs5.CC.Lehigh.EDU. 83.52.180.128.in-addr.arpa domain name pointer pc-mjp8.CC.Lehigh.EDU. 84.52.180.128.in-addr.arpa domain name pointer mjp8pc2.CC.Lehigh.EDU. 85.52.180.128.in-addr.arpa domain name pointer jcb0.CC.Lehigh.EDU. 86.52.180.128.in-addr.arpa domain name pointer esitest.CC.Lehigh.EDU. 87.52.180.128.in-addr.arpa domain name pointer pc-bdhb.CC.Lehigh.EDU. 88.52.180.128.in-addr.arpa domain name pointer rw00.CC.Lehigh.EDU. 89.52.180.128.in-addr.arpa domain name pointer mlp5.CC.Lehigh.EDU. 90.52.180.128.in-addr.arpa domain name pointer pyc1.CC.Lehigh.EDU. Host 91.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) 92.52.180.128.in-addr.arpa domain name pointer smke.CC.Lehigh.EDU. 93.52.180.128.in-addr.arpa domain name pointer pc-gal0.CC.Lehigh.EDU. 94.52.180.128.in-addr.arpa domain name pointer jpe1.CC.Lehigh.EDU. 95.52.180.128.in-addr.arpa domain name pointer phil.CC.Lehigh.EDU. 96.52.180.128.in-addr.arpa domain name pointer lubri.CC.Lehigh.EDU. 97.52.180.128.in-addr.arpa domain name pointer smk4.CC.Lehigh.EDU. 98.52.180.128.in-addr.arpa domain name pointer rbe3.CC.Lehigh.EDU. 99.52.180.128.in-addr.arpa domain name pointer ph-52-99.dept.Lehigh.EDU. 100.52.180.128.in-addr.arpa domain name pointer fred.CC.Lehigh.EDU. 101.52.180.128.in-addr.arpa domain name pointer jen2.CC.Lehigh.EDU. Host 102.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 103.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 104.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) 105.52.180.128.in-addr.arpa domain name pointer Dyn052105.dept.Lehigh.EDU. 106.52.180.128.in-addr.arpa domain name pointer Dyn052106.dept.Lehigh.EDU. 107.52.180.128.in-addr.arpa domain name pointer Dyn052107.dept.Lehigh.EDU. 108.52.180.128.in-addr.arpa domain name pointer Dyn052108.dept.Lehigh.EDU. 109.52.180.128.in-addr.arpa domain name pointer Dyn052109.dept.Lehigh.EDU. 110.52.180.128.in-addr.arpa domain name pointer Dyn052110.dept.Lehigh.EDU. 111.52.180.128.in-addr.arpa domain name pointer Dyn052111.dept.Lehigh.EDU. 112.52.180.128.in-addr.arpa domain name pointer Dyn052112.dept.Lehigh.EDU. 113.52.180.128.in-addr.arpa domain name pointer Dyn052113.dept.Lehigh.EDU. 114.52.180.128.in-addr.arpa domain name pointer Dyn052114.dept.Lehigh.EDU. 115.52.180.128.in-addr.arpa domain name pointer Dyn052115.dept.Lehigh.EDU. 116.52.180.128.in-addr.arpa domain name pointer Dyn052116.dept.Lehigh.EDU. 117.52.180.128.in-addr.arpa domain name pointer Dyn052117.dept.Lehigh.EDU. 118.52.180.128.in-addr.arpa domain name pointer Dyn052118.dept.Lehigh.EDU. 119.52.180.128.in-addr.arpa domain name pointer Dyn052119.dept.Lehigh.EDU. 120.52.180.128.in-addr.arpa domain name pointer Dyn052120.dept.Lehigh.EDU. 121.52.180.128.in-addr.arpa domain name pointer Dyn052121.dept.Lehigh.EDU. 122.52.180.128.in-addr.arpa domain name pointer Dyn052122.dept.Lehigh.EDU. 123.52.180.128.in-addr.arpa domain name pointer Dyn052123.dept.Lehigh.EDU. 124.52.180.128.in-addr.arpa domain name pointer Dyn052124.dept.Lehigh.EDU. 125.52.180.128.in-addr.arpa domain name pointer Dyn052125.dept.Lehigh.EDU. 126.52.180.128.in-addr.arpa domain name pointer Dyn052126.dept.Lehigh.EDU. 127.52.180.128.in-addr.arpa domain name pointer Dyn052127.dept.Lehigh.EDU. 128.52.180.128.in-addr.arpa domain name pointer Dyn052128.dept.Lehigh.EDU. 129.52.180.128.in-addr.arpa domain name pointer Dyn052129.dept.Lehigh.EDU. 130.52.180.128.in-addr.arpa domain name pointer Dyn052130.dept.Lehigh.EDU. 131.52.180.128.in-addr.arpa domain name pointer Dyn052131.dept.Lehigh.EDU. 132.52.180.128.in-addr.arpa domain name pointer Dyn052132.dept.Lehigh.EDU. 133.52.180.128.in-addr.arpa domain name pointer Dyn052133.dept.Lehigh.EDU. 134.52.180.128.in-addr.arpa domain name pointer Dyn052134.dept.Lehigh.EDU. 135.52.180.128.in-addr.arpa domain name pointer Dyn052135.dept.Lehigh.EDU. 136.52.180.128.in-addr.arpa domain name pointer Dyn052136.dept.Lehigh.EDU. 137.52.180.128.in-addr.arpa domain name pointer Dyn052137.dept.Lehigh.EDU. 138.52.180.128.in-addr.arpa domain name pointer Dyn052138.dept.Lehigh.EDU. 139.52.180.128.in-addr.arpa domain name pointer Dyn052139.dept.Lehigh.EDU. 140.52.180.128.in-addr.arpa domain name pointer Dyn052140.dept.Lehigh.EDU. 141.52.180.128.in-addr.arpa domain name pointer Dyn052141.dept.Lehigh.EDU. 142.52.180.128.in-addr.arpa domain name pointer Dyn052142.dept.Lehigh.EDU. 143.52.180.128.in-addr.arpa domain name pointer Dyn052143.dept.Lehigh.EDU. 144.52.180.128.in-addr.arpa domain name pointer Dyn052144.dept.Lehigh.EDU. 145.52.180.128.in-addr.arpa domain name pointer Dyn052145.dept.Lehigh.EDU. 146.52.180.128.in-addr.arpa domain name pointer Dyn052146.dept.Lehigh.EDU. 147.52.180.128.in-addr.arpa domain name pointer Dyn052147.dept.Lehigh.EDU. 148.52.180.128.in-addr.arpa domain name pointer Dyn052148.dept.Lehigh.EDU. 149.52.180.128.in-addr.arpa domain name pointer Dyn052149.dept.Lehigh.EDU. 150.52.180.128.in-addr.arpa domain name pointer Dyn052150.dept.Lehigh.EDU. 151.52.180.128.in-addr.arpa domain name pointer Dyn052151.dept.Lehigh.EDU. 152.52.180.128.in-addr.arpa domain name pointer Dyn052152.dept.Lehigh.EDU. 153.52.180.128.in-addr.arpa domain name pointer Dyn052153.dept.Lehigh.EDU. 154.52.180.128.in-addr.arpa domain name pointer Dyn052154.dept.Lehigh.EDU. 155.52.180.128.in-addr.arpa domain name pointer Dyn052155.dept.Lehigh.EDU. 156.52.180.128.in-addr.arpa domain name pointer Dyn052156.dept.Lehigh.EDU. 157.52.180.128.in-addr.arpa domain name pointer Dyn052157.dept.Lehigh.EDU. 158.52.180.128.in-addr.arpa domain name pointer Dyn052158.dept.Lehigh.EDU. 159.52.180.128.in-addr.arpa domain name pointer Dyn052159.dept.Lehigh.EDU. 160.52.180.128.in-addr.arpa domain name pointer Dyn052160.dept.Lehigh.EDU. Host 161.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 162.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 163.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 164.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 165.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 166.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 167.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 168.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 169.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 170.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 171.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 172.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 173.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 174.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 175.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) 176.52.180.128.in-addr.arpa domain name pointer tar2.dept.Lehigh.EDU. Host 177.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 178.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 179.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 180.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 181.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 182.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 183.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 184.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 185.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 186.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 187.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 188.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) 189.52.180.128.in-addr.arpa domain name pointer dmd1-pc.dept.Lehigh.EDU. Host 190.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 191.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 192.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 193.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 194.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 195.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 196.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 197.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 198.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 199.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 200.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) 201.52.180.128.in-addr.arpa domain name pointer rim3.dept.Lehigh.EDU. 202.52.180.128.in-addr.arpa domain name pointer Dyn052202.dept.Lehigh.EDU. 203.52.180.128.in-addr.arpa domain name pointer Dyn052203.dept.Lehigh.EDU. 204.52.180.128.in-addr.arpa domain name pointer Dyn052204.dept.Lehigh.EDU. 205.52.180.128.in-addr.arpa domain name pointer Dyn052205.dept.Lehigh.EDU. 206.52.180.128.in-addr.arpa domain name pointer Dyn052206.dept.Lehigh.EDU. 207.52.180.128.in-addr.arpa domain name pointer Dyn052207.dept.Lehigh.EDU. 208.52.180.128.in-addr.arpa domain name pointer Dyn052208.dept.Lehigh.EDU. 209.52.180.128.in-addr.arpa domain name pointer Dyn052209.dept.Lehigh.EDU. 210.52.180.128.in-addr.arpa domain name pointer Dyn052210.dept.Lehigh.EDU. 211.52.180.128.in-addr.arpa domain name pointer Dyn052211.dept.Lehigh.EDU. 212.52.180.128.in-addr.arpa domain name pointer Dyn052212.dept.Lehigh.EDU. 213.52.180.128.in-addr.arpa domain name pointer Dyn052213.dept.Lehigh.EDU. 214.52.180.128.in-addr.arpa domain name pointer Dyn052214.dept.Lehigh.EDU. 215.52.180.128.in-addr.arpa domain name pointer Dyn052215.dept.Lehigh.EDU. 216.52.180.128.in-addr.arpa domain name pointer Dyn052216.dept.Lehigh.EDU. 217.52.180.128.in-addr.arpa domain name pointer Dyn052217.dept.Lehigh.EDU. 218.52.180.128.in-addr.arpa domain name pointer Dyn052218.dept.Lehigh.EDU. 219.52.180.128.in-addr.arpa domain name pointer Dyn052219.dept.Lehigh.EDU. 220.52.180.128.in-addr.arpa domain name pointer Dyn052220.dept.Lehigh.EDU. 221.52.180.128.in-addr.arpa domain name pointer Dyn052221.dept.Lehigh.EDU. 222.52.180.128.in-addr.arpa domain name pointer Dyn052222.dept.Lehigh.EDU. 223.52.180.128.in-addr.arpa domain name pointer Dyn052223.dept.Lehigh.EDU. 224.52.180.128.in-addr.arpa domain name pointer Dyn052224.dept.Lehigh.EDU. 225.52.180.128.in-addr.arpa domain name pointer Dyn052225.dept.Lehigh.EDU. 226.52.180.128.in-addr.arpa domain name pointer Dyn052226.dept.Lehigh.EDU. 227.52.180.128.in-addr.arpa domain name pointer Dyn052227.dept.Lehigh.EDU. 228.52.180.128.in-addr.arpa domain name pointer Dyn052228.dept.Lehigh.EDU. 229.52.180.128.in-addr.arpa domain name pointer Dyn052229.dept.Lehigh.EDU. 230.52.180.128.in-addr.arpa domain name pointer Dyn052230.dept.Lehigh.EDU. Host 231.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 232.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 233.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 234.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 235.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 236.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 237.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 238.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 239.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 240.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 241.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 242.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 243.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 244.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 245.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 246.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 247.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 248.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 249.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 250.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 251.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 252.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) Host 253.52.180.128.in-addr.arpa not found: 3(NXDOMAIN) 254.52.180.128.in-addr.arpa domain name pointer ChristmasSaucon.CC.Lehigh.EDU. Host 255.52.180.128.in-addr.arpa not found: 3(NXDOMAIN)