Arqma Blockchain Explorer

(No Javascript | No Cookies | No Web Analytics Trackers | No Images | Open Sourced)

Server Time: 2026-04-06 11:03:10 | Transaction Pool | Autorefresh is OFF | Go to stagenet explorer | Go to mainnet explorer

Network difficulty: 314000237 | Hard fork: v19 | Hash rate: 2.617 MH/s | Staking Requirement: 100000.000000000 ARQ | Fee: 0.000000050/byte + 0.000090000/output | Median block size limit: 1024.00 kB | Data From 00:00:49 [h:m:s] ago

TX Types Legend: Registration: 🏁 | Contribution: ⚑ | Recommission: 👍 | Decommission: 👎 | Deregister: 🚫 | IP Change Penalty: 📋 | Stake Unlock: 🔓

Arqma emission (fees) is 37281268.239012659 (1023.646417109) as of 1917986 block

Transaction Pool

(No Of TXs: 1, Size: 1.4180 kB, Updated every 5 seconds)

Age [HH:MM:SS] Type Transaction Hash Fee/Per kB In/Out TX Size [kB]
00:06:25 2fc3a0a31976896a1ae5e7b2e15e938056e881659da046e10850722dca96d936 0.0003/0.0002 1/2 1.42

Transactions In Older Blocks

(Median size of 100 blocks: 1024.00 kB)

Height Age [y:d:h:m:s] Size [kB] Type Transaction Hash Fee Outputs In/Out TX Size [kB]
47046 07:165:13:49:17 0.3057 10511e7ac7221435c73cbe1294c1b48fc53367ff1094e9dd14c8baee86153df0 N/A 19.810000000 0/4 0.3057
47045 07:165:13:49:18 0.3057 f35fb598a2f63ac71cf070f004d7bdd63a00d346ee97b8de37a8d187178c2c4b N/A 19.810000000 0/4 0.3057
47044 07:165:13:49:46 0.3057 bbadfe2b70ee6d1e78405d5bb210489e75bff5f5ca35a5f3c5a3bd38882b8960 N/A 19.810000000 0/4 0.3057
47043 07:165:13:50:08 0.3057 bf2c4ca389d78b7eb2e478710dbdca8894ffb8024b193cb0d55706300fad033b N/A 19.810000000 0/4 0.3057
47042 07:165:13:51:00 0.3057 da4db968b3ae02c40bdb8c392dd2f5f97f312db2e20a5214cfee0bb221966b90 N/A 19.810000000 0/4 0.3057
47041 07:165:13:53:07 0.3057 5883b7b8ae211cf6869cca0b4df32c769046c9a76824baf5c1e878e168bf3668 N/A 19.810000000 0/4 0.3057
47040 07:165:14:11:46 7.3066 a5f66c0b49bdbed45955602efdf92c0d2af7805135a01753ab108f144e6fe779 N/A 19.823242349 0/1 0.0908
8134df2e5803b63b74f5717c2ddaeda994d7798e43850b863f3c064a51e8fabf 0.002377932 ? 1/2 2.1436
b32ed22e9863210cc18842600f43e14e9361df3b8a43cdaad205a65f7cce4bbc 0.004755864 ? 2/5 5.0723
47039 07:165:14:20:34 4.9580 6562c1d1d34df226e0fecfbec2e154ccdda68169750a5ba3962782669b606a8a N/A 19.820873872 0/1 0.0996
8c20ba8d1a8671af55a07bf864eb7f31c50c5690212c295d47427a30a264e0db 0.002377935 ? 1/2 2.1436
4a23e3c58cb1d115086981775dbd22d375590529e2e9955595c505eda98f9cbb 0.002377935 ? 2/2 2.7148
47038 07:165:14:24:26 0.3057 e836db277d21591884caf077fc416e4716924fcdfbd059190d598bd6ae3f3eb4 N/A 19.810000000 0/4 0.3057
47037 07:165:14:24:53 0.3057 b600bda00c002404b8531f29d0a4353c26d3c8a6a97ff703e2e851f5285a3132 N/A 19.810000000 0/4 0.3057
47036 07:165:14:26:07 22.3037 d1ed05eeb20790fab6ae401695303811903721be4b518a0e6ba9940dc5bf52fc N/A 19.835169847 0/1 0.0996
43daec581f36a385820429dc20c07e2cbbcc1eb447d5d30040d91f6e625205bb 0.003963230 ? 4/2 4.0811
bcc072d34b322aaf337e6856a89a0e80fed34fe4d4f1c5b061ba18db2520899c 0.002377938 ? 2/2 2.7266
6ce4d07fd20904157f03bf3219598c3f323b86bc13ce5e53d47aa81c95abf132 0.002377938 ? 2/2 2.7266
ecf4eb270bea7e93d4007a1b8f5991a0133f91b9884b041ee6f7bfd57f3ec04a 0.010304398 ? 18/2 12.6699
47035 07:165:14:27:19 3.5986 fdcf966f03437ea28544f9fd835b048cdd3fe9f92cce654448a98dcff7d26e23 N/A 19.819326376 0/1 0.0996
8d43b3beae09f1e1b51c0a1d059f0fa7e232d9896bab4d8e14a1ac871e65de68 0.003170584 ? 2/3 3.4990
47034 07:165:14:27:39 0.3057 746910c07fa4de3bda01ce89605159a8faefe4c0749c170facf7f778638f3b99 N/A 19.810000000 0/4 0.3057
47033 07:165:14:30:15 0.3057 b15f83bde71a69b8bc0c81b3e3456ffb40ee0ced5ea2739f18018c745b6e91df N/A 19.810000000 0/4 0.3057
47032 07:165:14:32:15 0.0908 16200a86dcd1814ee820b50b62a81cb6870f85a3470374e7d4c7fc8ceadefe7f N/A 19.816184134 0/1 0.0908
47031 07:165:14:37:21 2.8164 61a9924be01f88b14f39013e58c0f1b50ae16d9c190969ab7a4f8bba76663022 N/A 19.818571527 0/1 0.0996
572454819ccc16d1efc828918b3000c023f58f5d6905e948fbcdcc6b925b4e87 0.002377944 ? 2/2 2.7168
47030 07:165:14:53:44 4.3887 dbb1f58a5ab77f366ecc56aa4964d76d84976dd1a5d018a01342b80b3bd71d46 N/A 19.820166272 0/1 0.0996
8fa4e78b14fda52e28ef775e5f09dcbfb8afae77c803b5965803e1b1d5c69bc6 0.003963240 ? 2/4 4.2891
47029 07:165:14:58:07 0.3057 a0e5df6a24c0dc83155d31e705c0b6af9c250c327c504dfc4bdf18f94bb5f443 N/A 19.810000000 0/4 0.3057
47028 07:165:15:00:13 6.5020 f1d0aa295921a2f653abceac6f6f4b6eff567e615d9239412952bcffd51dfdaf N/A 19.823355768 0/1 0.0908
e59fa4548f824769dc9c011de66a6cd288ec443ab3de5e6f3ff89d7e833111e2 0.002377947 ? 1/2 2.1338
fd4cb07ba846f7172a64d14b3fb7b7ccf61f49c867ea5a3ca13199897de8c146 0.002377947 ? 1/2 2.1338
2670e7dc4fa28f3da9c7b35a570b1bf646f9c337669bfb6dc4a6082c71eed16e 0.002377947 ? 1/2 2.1436
47027 07:165:15:07:52 0.3057 a6086d624be600ca430bd69591dbb7c9852404ecec8102a69e3edc460ce56b5a N/A 19.810000000 0/4 0.3057
Prev
Current Page: 93547/95899
Next

Service Nodes

0 service nodes awaiting contributions, 1 decommissioned service nodes, and 43 active service nodes.

Service Nodes Awaiting Contributions (0)

Public Key Contributors Operator Fee (%) Contributed Open For Contribution Min. Contribution Expiry Date UTC (Estimated)

Inactive/Decommissioned Service Nodes (1)

(These service nodes are currently decommissioned for failing network obligations, are not earning rewards, and face deregistration soon)

Public Key Contributors Operator Fee (%) Decommission Height Last Uptime Proof Blocks until Dereg.
0731fb56884ea6dcbd89786ebab0fcdf80d68c41aeeaa759b291daf59320a9bc 1/12 1917664 Not Received 397 (13.2 hours)

Active Service Nodes (43)

Public Key Contributors Operator Fee (%) Staking Requirement Last Reward Height Last Uptimr Proof Expiry Date UTC (Estimated)
b98ee2847b18dc4e46be8e384d59157a67a5366ee8b03553c519b520e147ef65 1/12 100000.000000000 1917948 00:56:34 Staking Infinitely
12236cc40c8f77213e83e179cbf3bc3066a8e9b6a6666430791d76e39369dcbe 1/12 100000.000000000 1917949 00:59:10 Staking Infinitely
33ef2ff577821dfc3e8ba0b6a7b62759f092c53d798cc1a9c5ba85f59f549efc 1/12 100000.000000000 1917950 00:20:20 Staking Infinitely
75ed97a747c6b790917a62befd733ec67df8a7b5a9861baa432521eaa788d2e2 3/12 50 100000.000000000 1917951 00:36:56 Staking Infinitely
4a407bb5161d9ad488e4feb1ce4870d5076d223d24160476275f2e292c290d21 1/12 100000.000000000 1917952 00:39:04 Staking Infinitely
361f463346d3409705042d85617b51e1c61f8821cc3c21f16ce9034d5b761c1f 1/12 100000.000000000 1917953 00:13:28 Staking Infinitely
30f9c742e16707fb9b0c9c2078ed750595e297e4a0f75b972794766e25447cfc 1/12 100000.000000000 1917954 00:30:26 Staking Infinitely
2f235e88eada0dcabd49b9f2ee0fcd1002dbfabfe7dc273dc445e1e8abc220c0 1/12 100000.000000000 1917955 00:09:03 Staking Infinitely
c6c5fce08eef76dca701248665f0586f83da2243ba13781899abc525b3572063 3/12 50 100000.000000000 1917956 00:26:30 Staking Infinitely
53b13c3b12f633765fad6a3af5e9910067af666c8c35940a5d0190ef05e86016 1/12 100000.000000000 1917957 00:31:03 Staking Infinitely
+ 33 more ↪

click here to see the full service node lists (at most only 10 of each list are shown here)

Uptime quorum for height 1917984)

Public Key Last Uptime Proof Expiry Date UTC (Estimated)
Validators 10:
0: 050e45639e86a90ca465c5194642d9fee300ac170acdbb2c0144fc8ebaaf6b82 00:35:29 Staking Infinitely (N/A)
1: f0e1913158cd650f98270490ded011fc138bb0a18bce9dcb796276b58f32340a 00:56:50 Staking Infinitely (N/A)
2: 781efae048bb90829a0c7ce9f4c9c34e572d236955e91f4b3c86a85effa632d5 00:39:04 Staking Infinitely (N/A)
3: 80a869c7963e4c92ccd1032749e29b33e7e943f4e70cbe8d9a3110115a0a53e3 00:38:58 Staking Infinitely (N/A)
4: c6c5fce08eef76dca701248665f0586f83da2243ba13781899abc525b3572063 00:26:30 Staking Infinitely (N/A)
5: 5a67c6e399571ec4665cc61cc19a5e84eeab60cf51c4f75fac5eea24a33d87e0 00:19:23 2026-04-08 05:35:10 (in 1.8 days)
6: b98ee2847b18dc4e46be8e384d59157a67a5366ee8b03553c519b520e147ef65 00:56:34 Staking Infinitely (N/A)
7: c338966f59c208f065e570e4631dced159118467b174e2cadc0bd59ff4768987 00:29:47 Staking Infinitely (N/A)
8: 12236cc40c8f77213e83e179cbf3bc3066a8e9b6a6666430791d76e39369dcbe 00:59:10 Staking Infinitely (N/A)
9: 3643a6e19bdae79cbabfb961391dd60cff5f219e30bbcbb559f0602325d7ab5d 00:58:45 Staking Infinitely (N/A)
Nodes to test (34):
0: c442b8c2be6b9175211390d4dbf3d3c6b9c8132517335eabbffce8b68da71b36 00:30:41 Staking Infinitely (N/A)
1: 30f3281710c23bb2c9b11a8bc0a3f63876ad2d974a55f08db00dde2f1fce4f3e 00:37:59 Staking Infinitely (N/A)
2: 3a695a55e9442573865950ec85b393e7ade3a76690b62d0e992f32f246943bd1 00:31:20 Staking Infinitely (N/A)
3: 5d21979e8b9332bfc583b3855b5e1b047080dce4609a21454595892ca797f514 00:59:47 Staking Infinitely (N/A)
4: f63e2a3a60e5d07f8fe0a32943c3f362d3d441c0ba771a997e9c893f16e4dff2 00:34:24 Staking Infinitely (N/A)
5: 2083e7a16cef72aced08ba92106bf9cff6725bede937ff82c1156fd7fa2f3c7a 00:53:48 Staking Infinitely (N/A)
6: 83b11eca71c4a2d77d256304fd422493ed4d290e3cb084bf76758d239fe9a0b4 00:57:07 Staking Infinitely (N/A)
7: 0731fb56884ea6dcbd89786ebab0fcdf80d68c41aeeaa759b291daf59320a9bc Not Received Staking Infinitely (N/A)
8: 16927f2acef9455c357990988e651406fb3f5e6dcad09d28957d906b25ba9acc 00:44:10 Staking Infinitely (N/A)
9: 75ed97a747c6b790917a62befd733ec67df8a7b5a9861baa432521eaa788d2e2 00:36:56 Staking Infinitely (N/A)
+ 24 more ↪

Uptime quorum for height 1917983)

Public Key Last Uptime Proof Expiry Date UTC (Estimated)
Validators 10:
0: 2f235e88eada0dcabd49b9f2ee0fcd1002dbfabfe7dc273dc445e1e8abc220c0 00:09:03 Staking Infinitely (N/A)
1: 12236cc40c8f77213e83e179cbf3bc3066a8e9b6a6666430791d76e39369dcbe 00:59:10 Staking Infinitely (N/A)
2: 5a67c6e399571ec4665cc61cc19a5e84eeab60cf51c4f75fac5eea24a33d87e0 00:19:23 2026-04-08 05:35:10 (in 1.8 days)
3: e9ce4cbc023dd13600dd1b84e811838cccc09a169ab6cb51f537481242bddb1a 00:56:44 Staking Infinitely (N/A)
4: 33ef2ff577821dfc3e8ba0b6a7b62759f092c53d798cc1a9c5ba85f59f549efc 00:20:20 Staking Infinitely (N/A)
5: f9e9aa7608c8c134ff9c14ef92488c122b947fd27d8cfe31d6745546c462665b 00:30:29 Staking Infinitely (N/A)
6: 3a695a55e9442573865950ec85b393e7ade3a76690b62d0e992f32f246943bd1 00:31:20 Staking Infinitely (N/A)
7: 28f7c771d9cd63b4c3d5c8261c153f7e05f23f67a562dc5c39635445e1d1d268 00:00:46 Staking Infinitely (N/A)
8: 45f9349a3ceee3a75d6142204286d37dacf81c1f9ec01a65e7b716269726635d 00:42:35 Staking Infinitely (N/A)
9: 30f3281710c23bb2c9b11a8bc0a3f63876ad2d974a55f08db00dde2f1fce4f3e 00:37:59 Staking Infinitely (N/A)
Nodes to test (34):
0: d3e9da49cf45266c3a0270253b0e2921dcbf939cfa52e5de31130d9ef5fb921d 00:50:05 Staking Infinitely (N/A)
1: c6c5fce08eef76dca701248665f0586f83da2243ba13781899abc525b3572063 00:26:30 Staking Infinitely (N/A)
2: 53b13c3b12f633765fad6a3af5e9910067af666c8c35940a5d0190ef05e86016 00:31:03 Staking Infinitely (N/A)
3: 5d21979e8b9332bfc583b3855b5e1b047080dce4609a21454595892ca797f514 00:59:47 Staking Infinitely (N/A)
4: b98ee2847b18dc4e46be8e384d59157a67a5366ee8b03553c519b520e147ef65 00:56:34 Staking Infinitely (N/A)
5: 5da2fadfa1efc8e0982f30042c0853a60d3035e74f42f66d9433aa5975a297eb 00:06:42 Staking Infinitely (N/A)
6: 0a23d89cbd41b85c5bffec0f53289536393e1a91a6537caf7b2064d97f92f7bb 00:22:51 Staking Infinitely (N/A)
7: 81ea05da87ecfe7d707a13ded483e5a0ee257c3ff802cd01742185bc87d803d9 00:41:38 Staking Infinitely (N/A)
8: c338966f59c208f065e570e4631dced159118467b174e2cadc0bd59ff4768987 00:29:47 Staking Infinitely (N/A)
9: 4a9a479460d135c51723254462919ff51e4b692f2bc4aedafb26316494f45a64 01:04:26 Staking Infinitely (N/A)
+ 24 more ↪

Uptime quorum for height 1917982)

Public Key Last Uptime Proof Expiry Date UTC (Estimated)
Validators 10:
0: 33ef2ff577821dfc3e8ba0b6a7b62759f092c53d798cc1a9c5ba85f59f549efc 00:20:20 Staking Infinitely (N/A)
1: 80a869c7963e4c92ccd1032749e29b33e7e943f4e70cbe8d9a3110115a0a53e3 00:38:58 Staking Infinitely (N/A)
2: 81ea05da87ecfe7d707a13ded483e5a0ee257c3ff802cd01742185bc87d803d9 00:41:38 Staking Infinitely (N/A)
3: c442b8c2be6b9175211390d4dbf3d3c6b9c8132517335eabbffce8b68da71b36 00:30:41 Staking Infinitely (N/A)
4: 3a695a55e9442573865950ec85b393e7ade3a76690b62d0e992f32f246943bd1 00:31:20 Staking Infinitely (N/A)
5: 5a67c6e399571ec4665cc61cc19a5e84eeab60cf51c4f75fac5eea24a33d87e0 00:19:23 2026-04-08 05:35:10 (in 1.8 days)
6: 781efae048bb90829a0c7ce9f4c9c34e572d236955e91f4b3c86a85effa632d5 00:39:04 Staking Infinitely (N/A)
7: 12236cc40c8f77213e83e179cbf3bc3066a8e9b6a6666430791d76e39369dcbe 00:59:10 Staking Infinitely (N/A)
8: ca0113d6999df9187b7959b602c7557cf9658a274fd89948c5aead79eb95a510 00:30:33 Staking Infinitely (N/A)
9: 3643a6e19bdae79cbabfb961391dd60cff5f219e30bbcbb559f0602325d7ab5d 00:58:45 Staking Infinitely (N/A)
Nodes to test (34):
0: 0a23d89cbd41b85c5bffec0f53289536393e1a91a6537caf7b2064d97f92f7bb 00:22:51 Staking Infinitely (N/A)
1: 4332a2f6e1973fe1e60d297171d50c093028fd0021c44837448505d8c3b170d9 00:00:41 Staking Infinitely (N/A)
2: 2083e7a16cef72aced08ba92106bf9cff6725bede937ff82c1156fd7fa2f3c7a 00:53:48 Staking Infinitely (N/A)
3: 28f7c771d9cd63b4c3d5c8261c153f7e05f23f67a562dc5c39635445e1d1d268 00:00:46 Staking Infinitely (N/A)
4: b98ee2847b18dc4e46be8e384d59157a67a5366ee8b03553c519b520e147ef65 00:56:34 Staking Infinitely (N/A)
5: 2f235e88eada0dcabd49b9f2ee0fcd1002dbfabfe7dc273dc445e1e8abc220c0 00:09:03 Staking Infinitely (N/A)
6: 050e45639e86a90ca465c5194642d9fee300ac170acdbb2c0144fc8ebaaf6b82 00:35:29 Staking Infinitely (N/A)
7: 5da2fadfa1efc8e0982f30042c0853a60d3035e74f42f66d9433aa5975a297eb 00:06:42 Staking Infinitely (N/A)
8: 5d21979e8b9332bfc583b3855b5e1b047080dce4609a21454595892ca797f514 00:59:47 Staking Infinitely (N/A)
9: 45f9349a3ceee3a75d6142204286d37dacf81c1f9ec01a65e7b716269726635d 00:42:35 Staking Infinitely (N/A)
+ 24 more ↪

Checkpoint quorum for height 1917984 (determined by block 1917973)

Public Key Last Uptime Proof Expiry Date UTC (Estimated)
0: 050e45639e86a90ca465c5194642d9fee300ac170acdbb2c0144fc8ebaaf6b82 00:35:29 Staking Infinitely (N/A)
1: 2c9277494767de038291669f392ceb66b3889c23c574ab42db08e0b48ee8a7bf 00:21:19 Staking Infinitely (N/A)
2: 33ef2ff577821dfc3e8ba0b6a7b62759f092c53d798cc1a9c5ba85f59f549efc 00:20:20 Staking Infinitely (N/A)
3: 30f9c742e16707fb9b0c9c2078ed750595e297e4a0f75b972794766e25447cfc 00:30:26 Staking Infinitely (N/A)
4: c99d98eadc123984ca4f9042e6e2e3460e43467a7136f61f7f0960ef92fec01e 00:30:52 Staking Infinitely (N/A)
5: 76e3e01fe63166ca4e448a2d9353486dbf966804c0eb51437d135fdd93e3eb3f 00:30:42 Staking Infinitely (N/A)
6: 80a869c7963e4c92ccd1032749e29b33e7e943f4e70cbe8d9a3110115a0a53e3 00:38:58 Staking Infinitely (N/A)
7: 2083e7a16cef72aced08ba92106bf9cff6725bede937ff82c1156fd7fa2f3c7a 00:53:48 Staking Infinitely (N/A)
8: b98ee2847b18dc4e46be8e384d59157a67a5366ee8b03553c519b520e147ef65 00:56:34 Staking Infinitely (N/A)
9: 16927f2acef9455c357990988e651406fb3f5e6dcad09d28957d906b25ba9acc 00:44:10 Staking Infinitely (N/A)
10: 3a695a55e9442573865950ec85b393e7ade3a76690b62d0e992f32f246943bd1 00:31:20 Staking Infinitely (N/A)
11: 3643a6e19bdae79cbabfb961391dd60cff5f219e30bbcbb559f0602325d7ab5d 00:58:45 Staking Infinitely (N/A)
12: 81ea05da87ecfe7d707a13ded483e5a0ee257c3ff802cd01742185bc87d803d9 00:41:38 Staking Infinitely (N/A)
13: c442b8c2be6b9175211390d4dbf3d3c6b9c8132517335eabbffce8b68da71b36 00:30:41 Staking Infinitely (N/A)
14: 12236cc40c8f77213e83e179cbf3bc3066a8e9b6a6666430791d76e39369dcbe 00:59:10 Staking Infinitely (N/A)
15: e9ce4cbc023dd13600dd1b84e811838cccc09a169ab6cb51f537481242bddb1a 00:56:44 Staking Infinitely (N/A)
16: 361f463346d3409705042d85617b51e1c61f8821cc3c21f16ce9034d5b761c1f 00:13:28 Staking Infinitely (N/A)
17: b42fb5a319f9ef592ada30e483b64431d05386ba5692727d0e64a15802be3ef5 00:08:43 Staking Infinitely (N/A)
18: d3e9da49cf45266c3a0270253b0e2921dcbf939cfa52e5de31130d9ef5fb921d 00:50:05 Staking Infinitely (N/A)
19: 83b11eca71c4a2d77d256304fd422493ed4d290e3cb084bf76758d239fe9a0b4 00:57:07 Staking Infinitely (N/A)

Note: The quorum shown here is the currently active voting height which is not necessarily the latest quorum. Quorums can only be voted on after a number of blocks have transpired.

Click here to see the last 1hrs worth of the stored quorum states

Last 5 checkpoints

Height Block hash Checkpoint Quorum
1917984 fba81552b55f601444441c12db853973789b0726b7cca46cfa38c15cd2505354 1917984; 20/20 signatures:
1917980 0ae249db468eb6ffcf361dc2faa5327f24fb9da60293afcf0d02d2aaf9a39f4c 1917980; 20/20 signatures:
1917972 4dfdb6b8b408c6fd48f5e280f131f1a77ae08a49012236d0689f7e52082c2b9e 1917972; 20/20 signatures:
1917964 e5c59ddcceef07cc859684dee6091a19042975bcbac0b7d51555fd9dd6a0c1c2 1917964; 20/20 signatures:
1917960 36d5f405a1912d6e4d8d143315ff585133e2f6059d1396fc58993241f96fed92 1917960; 20/20 signatures:

Check here to see the last 50 checkpoints

No javascript / No web analytics trackers / No cookies / No external resources / Open Sourced
Explorer Version (api): patches-2025-08-25-05fdb31 (8.0) Arqma Version: 10.0.0-4b067e8c_Release
Latest source code
Forked from: onion-monero-blockchain-explorer
Copyright (C), 2019-2025 arqma.com