Arqma Blockchain Explorer

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

Server Time: 2026-06-22 15:48:35 | Transaction Pool | Autorefresh is OFF | Go to stagenet explorer | Go to mainnet explorer

Network difficulty: 145000086 | Hard fork: v19 | Hash rate: 1.208 MH/s | Staking Requirement: 100000.000000000 ARQ | Fee: 0.000000050/byte + 0.000090000/output | Median block size limit: 1024.00 kB | Data From 00:00:07 [h:m:s] ago

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

Arqma emission (fees) is 38747334.239012659 (1040.330264059) as of 1968540 block

Transaction Pool

(No Of TXs: 6, Size: 12.9854 kB, Updated every 5 seconds)

Age [HH:MM:SS] Type Transaction Hash Fee/Per kB In/Out TX Size [kB]
00:01:25 9c7b748a3209680a7e48557d1e473ecd754e224684a0db194642acc99b118e5d 0.0003/0.0001 2/2 1.92
00:01:25 49a7df25096595f8ef91ffc518bc1a135b64dfa06adb2851b34d8b6981a35089 0.0004/0.0001 8/2 4.89
00:01:55 29a95bb8a59c03a558b2ea792ff2511dc8171903b1e44d27cd6a607f556ebb26 0.0003/0.0002 1/2 1.42
00:01:55 aaeac31dadaaf7d8ae5df4b278485e2bc95ae7c65144030893a375ccb3ccd4d1 0.0003/0.0002 1/2 1.42
00:01:55 8d037652f115c1c27acb573d6220ec9ab4462071ff66209864ff8e9d527b41e3 0.0003/0.0001 2/2 1.92
00:01:55 5f9dc043c79dd3ffee20ef1856f7d8f84dffad7deee71d526b6fd977649081ea 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]
40 08:009:18:01:42 0.0957 8e7454ec928e4f246c0494d6b483e312ba4c3ef1a4fee96b024f82709fb335df N/A 20.265212018 0/1 0.0957
39 08:009:18:01:43 0.0957 1abd98205ecabdb7bd35fc3a527816d477392cac963919ff486fbae83ad547dc N/A 20.265221681 0/1 0.0957
38 08:009:18:01:46 0.0957 c865043180a6a78eaa8183fde089785f468bf229a0fa8d5475c8f5cfd4214d40 N/A 20.265231344 0/1 0.0957
37 08:009:18:01:55 0.0957 3189d98f4ba51da04ceb7e2cdcf904d313ed9c9205b5bd21e7b755c8b52c1875 N/A 20.265241008 0/1 0.0957
36 08:009:18:02:07 0.0957 64a25e7c9a2fe12afd45853ed184a5410005cd6d0aa3375fcd9f560eb21471f6 N/A 20.265250671 0/1 0.0957
35 08:009:18:02:14 0.0957 9cacfe5d1525e29f228fa744ea3cdebeba7950929c2d17104c4e7517bb5b98eb N/A 20.265260334 0/1 0.0957
34 08:009:20:42:34 0.0771 b7103aa817cba489f3074d852c74cbb1273edb9f08c83ef1f32e69e83fb4782a N/A 20.265269997 0/1 0.0771
33 08:009:20:42:35 0.0771 5a7cc146098730c1b9a94ffd9287eef641247dccfb62646786f366dd3cf8c007 N/A 20.265279660 0/1 0.0771
32 08:009:20:42:35 0.0771 e01d8907bc307cc43e7be0cfe37dc9985b37cbd85cebf35b897e118fee1c6e20 N/A 20.265289324 0/1 0.0771
31 08:009:20:42:38 0.0771 73613660c6626fa54836de53ffa673005de43238d7720e48bbe03038773117cf N/A 20.265298987 0/1 0.0771
30 08:009:20:42:41 0.0771 77e1b0e7a124e7a85e710a984d4ff5e7ae83f7104a7a41a7f8994686c39ab927 N/A 20.265308650 0/1 0.0771
29 08:009:20:42:44 0.0771 e21fc79692b1b21eb137c163084171e998a8b1e005d2365e8907c84a1f2e504d N/A 20.265318313 0/1 0.0771
28 08:009:20:42:47 0.0771 4ba4b28e7256030dc9145c8fdd23509d6a241258aa24478c57b1aeb59339392c N/A 20.265327977 0/1 0.0771
27 08:009:20:42:49 0.0771 79500bde707680323e01d629a8e08c26d04a862d4c6239e61b383c8ff5010481 N/A 20.265337640 0/1 0.0771
26 08:009:20:42:50 0.0771 2886738207d39b311f0e659999ca4c7284ca59d34d76be135da0a9edc72b3a2a N/A 20.265347303 0/1 0.0771
25 08:009:20:42:51 0.0771 faa56daf9f3f0f277d0c2ae066ff14d8767597ab95bf08664e1733d12c528395 N/A 20.265356967 0/1 0.0771
24 08:009:20:42:52 0.0771 1df0089f18e0dfbb4372e255f2907d63678de23e184466c4cd7803b568c1ee03 N/A 20.265366630 0/1 0.0771
23 08:009:20:42:54 0.0771 aaaab090bc0586b71e4dba4b966f52ec5ee86c121691fc3a7e8f5dab3f49cb73 N/A 20.265376293 0/1 0.0771
22 08:009:20:42:54 0.0771 494d33ee8886792181fe71e18ff8db3e9439d6ecf7f72240d84ed76285ca5902 N/A 20.265385956 0/1 0.0771
21 08:009:20:42:55 0.0771 d76288ff1457a664d52645784f39acbe9649d74d1de2116ff6c7da87f6dd9d54 N/A 20.265395620 0/1 0.0771
Prev
Current Page: 98425/98427
Next

Uptime quorum for height 1968538)

Public Key Last Uptime Proof Expiry Date UTC (Estimated)
Validators 10:
0: 64704fc7e91c0d73d5a05f608f0899b45e99fa711383057dcc59064a98c257ab 00:16:11 Staking Infinitely (N/A)
1: 2083e7a16cef72aced08ba92106bf9cff6725bede937ff82c1156fd7fa2f3c7a 00:04:16 Staking Infinitely (N/A)
2: de7f05e258ce90d2e33e7e62955c9f29daa1f9e5ab291884505203cf4cad83a8 00:21:51 Staking Infinitely (N/A)
3: e42f2089d5ae0048ef1e3307e080d7f715e9166e0618bc02faea8c766186310a 00:55:46 Staking Infinitely (N/A)
4: 361f463346d3409705042d85617b51e1c61f8821cc3c21f16ce9034d5b761c1f 00:20:02 Staking Infinitely (N/A)
5: 45f9349a3ceee3a75d6142204286d37dacf81c1f9ec01a65e7b716269726635d 00:30:09 Staking Infinitely (N/A)
6: 4a9a479460d135c51723254462919ff51e4b692f2bc4aedafb26316494f45a64 00:57:30 Staking Infinitely (N/A)
7: bf84fec11377bd3f6a46c27484a8f46050274067047fefe4b15cfd566d68a671 00:01:50 Staking Infinitely (N/A)
8: 83b11eca71c4a2d77d256304fd422493ed4d290e3cb084bf76758d239fe9a0b4 00:09:05 Staking Infinitely (N/A)
9: 75ed97a747c6b790917a62befd733ec67df8a7b5a9861baa432521eaa788d2e2 00:52:37 Staking Infinitely (N/A)
Nodes to test (42):
0: f6dd8aed6be4f87be7c820761668cf51a22a5d430ca3bfd9115d385abf435d93 00:42:05 Staking Infinitely (N/A)
1: c99d98eadc123984ca4f9042e6e2e3460e43467a7136f61f7f0960ef92fec01e 00:07:12 Staking Infinitely (N/A)
2: a5ae405941249e1cc812bdae01081cdbfe7963f1bc8d299e444effc2b6930195 00:01:36 Staking Infinitely (N/A)
3: b98ee2847b18dc4e46be8e384d59157a67a5366ee8b03553c519b520e147ef65 00:01:17 Staking Infinitely (N/A)
4: 94b370885630009cbe68165b641e51343bcb90aba151434230424f6e3ec4a6d2 00:22:06 Staking Infinitely (N/A)
5: 781efae048bb90829a0c7ce9f4c9c34e572d236955e91f4b3c86a85effa632d5 00:30:21 Staking Infinitely (N/A)
6: a382ea37422bc7715fb954fd567ae77c7b8db3bf92a2d4ac48025e0122832641 00:14:06 Staking Infinitely (N/A)
7: 30f3281710c23bb2c9b11a8bc0a3f63876ad2d974a55f08db00dde2f1fce4f3e 00:10:59 Staking Infinitely (N/A)
8: c9839bdce086483c6fae8ede8600e4410c5dcd2a431148689480ddfd4c6c9363 00:24:54 Staking Infinitely (N/A)
9: 81ea05da87ecfe7d707a13ded483e5a0ee257c3ff802cd01742185bc87d803d9 00:08:01 Staking Infinitely (N/A)
+ 32 more ↪

Uptime quorum for height 1968537)

Public Key Last Uptime Proof Expiry Date UTC (Estimated)
Validators 10:
0: f6dd8aed6be4f87be7c820761668cf51a22a5d430ca3bfd9115d385abf435d93 00:42:05 Staking Infinitely (N/A)
1: 4a9a479460d135c51723254462919ff51e4b692f2bc4aedafb26316494f45a64 00:57:30 Staking Infinitely (N/A)
2: 80a869c7963e4c92ccd1032749e29b33e7e943f4e70cbe8d9a3110115a0a53e3 00:27:41 Staking Infinitely (N/A)
3: 2c9277494767de038291669f392ceb66b3889c23c574ab42db08e0b48ee8a7bf 00:19:28 Staking Infinitely (N/A)
4: 94b370885630009cbe68165b641e51343bcb90aba151434230424f6e3ec4a6d2 00:22:06 Staking Infinitely (N/A)
5: c99d98eadc123984ca4f9042e6e2e3460e43467a7136f61f7f0960ef92fec01e 00:07:12 Staking Infinitely (N/A)
6: ab1264fe8acaba585069c1fb0afe0804a97bc00ef269c17231b7994024851111 00:09:04 Staking Infinitely (N/A)
7: 28f7c771d9cd63b4c3d5c8261c153f7e05f23f67a562dc5c39635445e1d1d268 00:16:41 Staking Infinitely (N/A)
8: b98ee2847b18dc4e46be8e384d59157a67a5366ee8b03553c519b520e147ef65 00:01:17 Staking Infinitely (N/A)
9: f9e9aa7608c8c134ff9c14ef92488c122b947fd27d8cfe31d6745546c462665b 00:31:09 Staking Infinitely (N/A)
Nodes to test (42):
0: de7f05e258ce90d2e33e7e62955c9f29daa1f9e5ab291884505203cf4cad83a8 00:21:51 Staking Infinitely (N/A)
1: 0a23d89cbd41b85c5bffec0f53289536393e1a91a6537caf7b2064d97f92f7bb 00:35:55 Staking Infinitely (N/A)
2: 4a407bb5161d9ad488e4feb1ce4870d5076d223d24160476275f2e292c290d21 00:10:46 Staking Infinitely (N/A)
3: 3cb0bba8f15c0902db46604f9fb6badeb0f611a645e4b29fb899342107c1f8c7 00:23:52 Staking Infinitely (N/A)
4: b42fb5a319f9ef592ada30e483b64431d05386ba5692727d0e64a15802be3ef5 00:00:43 Staking Infinitely (N/A)
5: ca0113d6999df9187b7959b602c7557cf9658a274fd89948c5aead79eb95a510 00:10:29 Staking Infinitely (N/A)
6: 139595b1c4670eb35a9cc6d32b6c351c53422d6ebf9405d0e2de6edb09afa5f2 00:33:11 Staking Infinitely (N/A)
7: 5a67c6e399571ec4665cc61cc19a5e84eeab60cf51c4f75fac5eea24a33d87e0 00:04:18 Staking Infinitely (N/A)
8: bf84fec11377bd3f6a46c27484a8f46050274067047fefe4b15cfd566d68a671 00:01:50 Staking Infinitely (N/A)
9: aa78babccc4e6e29d3becac648489e6da5c375ae22566dd9cc65880210d81539 00:03:00 Staking Infinitely (N/A)
+ 32 more ↪

Uptime quorum for height 1968536)

Public Key Last Uptime Proof Expiry Date UTC (Estimated)
Validators 10:
0: 75ed97a747c6b790917a62befd733ec67df8a7b5a9861baa432521eaa788d2e2 00:52:37 Staking Infinitely (N/A)
1: 361f463346d3409705042d85617b51e1c61f8821cc3c21f16ce9034d5b761c1f 00:20:02 Staking Infinitely (N/A)
2: 050e45639e86a90ca465c5194642d9fee300ac170acdbb2c0144fc8ebaaf6b82 00:32:44 Staking Infinitely (N/A)
3: b98ee2847b18dc4e46be8e384d59157a67a5366ee8b03553c519b520e147ef65 00:01:17 Staking Infinitely (N/A)
4: 28f7c771d9cd63b4c3d5c8261c153f7e05f23f67a562dc5c39635445e1d1d268 00:16:41 Staking Infinitely (N/A)
5: c6c5fce08eef76dca701248665f0586f83da2243ba13781899abc525b3572063 00:58:17 Staking Infinitely (N/A)
6: e42f2089d5ae0048ef1e3307e080d7f715e9166e0618bc02faea8c766186310a 00:55:46 Staking Infinitely (N/A)
7: 4a9a479460d135c51723254462919ff51e4b692f2bc4aedafb26316494f45a64 00:57:30 Staking Infinitely (N/A)
8: 81ea05da87ecfe7d707a13ded483e5a0ee257c3ff802cd01742185bc87d803d9 00:08:01 Staking Infinitely (N/A)
9: cf8f65a97c31057a45dec63b065e23d0763c1ea88c7282fafd738e3e090ef01b 00:48:50 Staking Infinitely (N/A)
Nodes to test (42):
0: f9e9aa7608c8c134ff9c14ef92488c122b947fd27d8cfe31d6745546c462665b 00:31:09 Staking Infinitely (N/A)
1: 93aeaadd2a426e4b78e8ddb88679d33d03e5e35c096095418db1dc69475c013f 00:02:32 Staking Infinitely (N/A)
2: c98ab9fca45aec5e9c8ea6f7dd0660b3567e3691d3cfbc4e4b035e737706160b 00:25:33 Staking Infinitely (N/A)
3: 30f9c742e16707fb9b0c9c2078ed750595e297e4a0f75b972794766e25447cfc 00:09:48 Staking Infinitely (N/A)
4: ca0113d6999df9187b7959b602c7557cf9658a274fd89948c5aead79eb95a510 00:10:29 Staking Infinitely (N/A)
5: 2c9277494767de038291669f392ceb66b3889c23c574ab42db08e0b48ee8a7bf 00:19:28 Staking Infinitely (N/A)
6: d3e9da49cf45266c3a0270253b0e2921dcbf939cfa52e5de31130d9ef5fb921d 00:22:02 Staking Infinitely (N/A)
7: 139595b1c4670eb35a9cc6d32b6c351c53422d6ebf9405d0e2de6edb09afa5f2 00:33:11 Staking Infinitely (N/A)
8: f63e2a3a60e5d07f8fe0a32943c3f362d3d441c0ba771a997e9c893f16e4dff2 00:56:31 Staking Infinitely (N/A)
9: 3cb0bba8f15c0902db46604f9fb6badeb0f611a645e4b29fb899342107c1f8c7 00:23:52 Staking Infinitely (N/A)
+ 32 more ↪

Checkpoint quorum for height 1968540 (determined by block 1968529)

Public Key Last Uptime Proof Expiry Date UTC (Estimated)
0: 81ea05da87ecfe7d707a13ded483e5a0ee257c3ff802cd01742185bc87d803d9 00:08:01 Staking Infinitely (N/A)
1: 30f3281710c23bb2c9b11a8bc0a3f63876ad2d974a55f08db00dde2f1fce4f3e 00:10:59 Staking Infinitely (N/A)
2: 4a407bb5161d9ad488e4feb1ce4870d5076d223d24160476275f2e292c290d21 00:10:46 Staking Infinitely (N/A)
3: f6dd8aed6be4f87be7c820761668cf51a22a5d430ca3bfd9115d385abf435d93 00:42:05 Staking Infinitely (N/A)
4: f9e9aa7608c8c134ff9c14ef92488c122b947fd27d8cfe31d6745546c462665b 00:31:09 Staking Infinitely (N/A)
5: b42fb5a319f9ef592ada30e483b64431d05386ba5692727d0e64a15802be3ef5 00:00:43 Staking Infinitely (N/A)
6: 2f235e88eada0dcabd49b9f2ee0fcd1002dbfabfe7dc273dc445e1e8abc220c0 00:23:39 Staking Infinitely (N/A)
7: f63e2a3a60e5d07f8fe0a32943c3f362d3d441c0ba771a997e9c893f16e4dff2 00:56:31 Staking Infinitely (N/A)
8: bf84fec11377bd3f6a46c27484a8f46050274067047fefe4b15cfd566d68a671 00:01:50 Staking Infinitely (N/A)
9: c6c5fce08eef76dca701248665f0586f83da2243ba13781899abc525b3572063 00:58:17 Staking Infinitely (N/A)
10: f0e1913158cd650f98270490ded011fc138bb0a18bce9dcb796276b58f32340a 00:52:06 Staking Infinitely (N/A)
11: a382ea37422bc7715fb954fd567ae77c7b8db3bf92a2d4ac48025e0122832641 00:14:06 Staking Infinitely (N/A)
12: 64704fc7e91c0d73d5a05f608f0899b45e99fa711383057dcc59064a98c257ab 00:16:11 Staking Infinitely (N/A)
13: 5a67c6e399571ec4665cc61cc19a5e84eeab60cf51c4f75fac5eea24a33d87e0 00:04:18 Staking Infinitely (N/A)
14: 75ed97a747c6b790917a62befd733ec67df8a7b5a9861baa432521eaa788d2e2 00:52:37 Staking Infinitely (N/A)
15: 5d21979e8b9332bfc583b3855b5e1b047080dce4609a21454595892ca797f514 01:04:49 Staking Infinitely (N/A)
16: 361f463346d3409705042d85617b51e1c61f8821cc3c21f16ce9034d5b761c1f 00:20:02 Staking Infinitely (N/A)
17: d3e9da49cf45266c3a0270253b0e2921dcbf939cfa52e5de31130d9ef5fb921d 00:22:02 Staking Infinitely (N/A)
18: 45f9349a3ceee3a75d6142204286d37dacf81c1f9ec01a65e7b716269726635d 00:30:09 Staking Infinitely (N/A)
19: c93716c955d7ced8be22fb112a0344fabde019949f2b26fedff327172ba6a973 00:16:02 Staking Infinitely (N/A)

Checkpoint quorum for height 1968536 (determined by block 1968525)

Public Key Last Uptime Proof Expiry Date UTC (Estimated)
0: c442b8c2be6b9175211390d4dbf3d3c6b9c8132517335eabbffce8b68da71b36 01:01:03 Staking Infinitely (N/A)
1: ab1264fe8acaba585069c1fb0afe0804a97bc00ef269c17231b7994024851111 00:09:04 Staking Infinitely (N/A)
2: 30f3281710c23bb2c9b11a8bc0a3f63876ad2d974a55f08db00dde2f1fce4f3e 00:10:59 Staking Infinitely (N/A)
3: e42f2089d5ae0048ef1e3307e080d7f715e9166e0618bc02faea8c766186310a 00:55:46 Staking Infinitely (N/A)
4: ca0113d6999df9187b7959b602c7557cf9658a274fd89948c5aead79eb95a510 00:10:29 Staking Infinitely (N/A)
5: 33ef2ff577821dfc3e8ba0b6a7b62759f092c53d798cc1a9c5ba85f59f549efc 00:09:14 Staking Infinitely (N/A)
6: 848ad910440f790d4a687cad83b333f99dec1fb47bae617c7a02db65b2f1c244 00:01:11 Staking Infinitely (N/A)
7: f9e9aa7608c8c134ff9c14ef92488c122b947fd27d8cfe31d6745546c462665b 00:31:09 Staking Infinitely (N/A)
8: 45f9349a3ceee3a75d6142204286d37dacf81c1f9ec01a65e7b716269726635d 00:30:09 Staking Infinitely (N/A)
9: c98ab9fca45aec5e9c8ea6f7dd0660b3567e3691d3cfbc4e4b035e737706160b 00:25:33 Staking Infinitely (N/A)
10: b98ee2847b18dc4e46be8e384d59157a67a5366ee8b03553c519b520e147ef65 00:01:17 Staking Infinitely (N/A)
11: 75ed97a747c6b790917a62befd733ec67df8a7b5a9861baa432521eaa788d2e2 00:52:37 Staking Infinitely (N/A)
12: 64704fc7e91c0d73d5a05f608f0899b45e99fa711383057dcc59064a98c257ab 00:16:11 Staking Infinitely (N/A)
13: f0e1913158cd650f98270490ded011fc138bb0a18bce9dcb796276b58f32340a 00:52:06 Staking Infinitely (N/A)
14: 76e3e01fe63166ca4e448a2d9353486dbf966804c0eb51437d135fdd93e3eb3f 00:10:56 Staking Infinitely (N/A)
15: de7f05e258ce90d2e33e7e62955c9f29daa1f9e5ab291884505203cf4cad83a8 00:21:51 Staking Infinitely (N/A)
16: bf84fec11377bd3f6a46c27484a8f46050274067047fefe4b15cfd566d68a671 00:01:50 Staking Infinitely (N/A)
17: 781efae048bb90829a0c7ce9f4c9c34e572d236955e91f4b3c86a85effa632d5 00:30:21 Staking Infinitely (N/A)
18: 2083e7a16cef72aced08ba92106bf9cff6725bede937ff82c1156fd7fa2f3c7a 00:04:16 Staking Infinitely (N/A)
19: 28f7c771d9cd63b4c3d5c8261c153f7e05f23f67a562dc5c39635445e1d1d268 00:16:41 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
1968540 da74cfb82b43583d500c31e25cc735226a6be5d42949c941c7900c06db2468f9 1968540; 20/20 signatures: ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
1968536 a826e3accb75c4e34f0a9d8ec3d53d257e43b86cb969a5f329d7a7db5a472b6f 1968536; 20/20 signatures: ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
1968532 d1a95c1b6922f9075daadd6f6c19e1ef774ced21e00e4937f7a22563d3a5ff41 1968532; 20/20 signatures: ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
1968480 a3bdeed9701f0f336ca790c3da4f9f6eddcf77fe19a7d6cfef228462e56a6648 1968480; 20/20 signatures: ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
1968420 9524205ebb8fd26688320366cad4ce67f03645767a6e49fa7fa6aeb1479e1af6 1968420; 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